Grinding Tool Device, Grinding Means, and Grinding Tool System

ABSTRACT

An abrasion plate includes at least one backing unit including one of a support pad and a support plate. At least one fastening unit is configured to detachably fasten at least one abrasive selected from the group consisting of an abrasive paper and an abrasive fleece, to the at least one backing unit. The abrasion plate further includes at least one backing element on which the abrasive is arranged via the fastening unit when the abrasive is detachably fastened to the at least one fastening unit. The at least one backing element is made from a material having a melting temperature of more than 160° C.

PRIOR ART

There has already been proposed in DE 10 2010 003 616 A1 an abrasiontool device having at least one backing unit, and having at least onefastening unit for detachably fastening an abrasive to the backing unit,wherein the backing unit comprises at least one backing element on whichthe abrasive is arranged via the fastening unit.

DISCLOSURE OF THE INVENTION

The invention is based on an abrasion tool device, in particular anabrasion plate, having at least one backing unit, in particular asupport pad or a support plate, and having at least one fastening unitfor detachably fastening an abrasive, in particular an abrasive paper oran abrasive fleece, to the backing unit, wherein the backing unitcomprises at least one backing element on which the abrasive is arrangedvia the fastening unit.

It is proposed that the backing element be made from a material having amelting temperature of more than 180° C., preferably more than 200° C.,particularly preferably more than 220° C., very particularly preferablymore than 240° C., and particularly advantageously preferably more than250° C. Preferably, the material from which the backing element isformed has a melting temperature that in particular is less than 350°C., preferably less than 300° C., particularly preferably less than 280°C., and particularly advantageously preferably less than 260° C. It isalso conceivable for the material from which the backing element isformed to have a melting temperature of more than 350° C. Preferably,the material from which the backing element is formed has a meltingtemperature that is less than 350° C. and greater than 180° C., inparticular less than 300° C. and greater than 200° C., preferably lessthan 280° C. and greater than 220° C., particularly preferably less than280° C. and greater than 240° C., and very particularly preferably lessthan 280° C. and greater than 250° C. Preferably, the backing element isat least mainly, in particular at least substantially entirely, madefrom the material having a melting temperature of more than 180° C.,preferably more than 200° C., particularly preferably more than 220° C.,very particularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. Preferably, the backingelement is at least mainly, in particular at least substantiallyentirely, is made from the material having a melting temperature of lessthan 350° C., preferably less than 300° C., particularly preferably lessthan 280° C., and particularly advantageously preferably less than 260°C. Preferably, the backing element is at least mainly, in particular atleast substantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 180° C., inparticular less than 300° C. and greater than 200° C., preferably lessthan 280° C. and greater than 220° C., particularly preferably less than280° C. and greater than 240° C., and very particularly preferably lessthan 280° C. and greater than 250° C. That “the backing element is madeat least substantially entirely from a material” is to be understood tomean, in particular, that the backing element is made at least 90% byvolume, preferably at least 95% by volume, and particularly preferablyat least 98% by volume, from the material. In particular, the materialof the backing element is realized, for example, as a metal, inparticular a metal alloy, as a ceramic, as a composite material and/oras a plastic. The backing element is preferably, in particular at leastmainly, plate-like, with in particular two at least partially oppositesides of the backing element aligned parallel to a plane of main extentof the backing element. A “plane of main extent” of a component, inparticular of the backing element, is to be understood to mean, inparticular, a plane that is parallel to a largest lateral face of asmallest notional cuboid that only just completely encloses the unit.Preferably, the backing element has at least one contact face that isrealized, in particular at least mainly, as a flat face. Preferably, thefastening unit is arranged on the backing element via the contact face.In particular, the contact face is aligned parallel to the plane of mainextent of the backing element.

In particular, the abrasion tool device comprises at least oneconnection region for connecting at least the abrasion tool device, inparticular at least the backing unit and the fastening unit, to anabrasion power tool, in particular a multifunction power tool that canbe driven in an oscillating manner. Preferably, the contact face isarranged on a side of the backing unit, in particular of the backingelement, that faces away from the connection region. It is alsoconceivable, however, for the contact face to be arranged on a side ofthe backing element that faces toward the connection region. It isconceivable for the connection region to be made from a material havinga melting temperature of at least more than 180° C., preferably morethan 200° C., particularly preferably more than 220° C., veryparticularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. In particular, it isconceivable for the connection region to be made from a material havinga melting temperature of less than 350° C., preferably less than 300°C., particularly preferably less than 280° C., and very particularlypreferably less than 260° C. Preferably, the connection region is madefrom a material having a melting temperature that is less than 350° C.and greater than 180° C., in particular less than 300° C. and greaterthan 200° C., preferably less than 280° C. and greater than 220° C.,particularly preferably less than 280° C. and greater than 240° C., andvery particularly preferably less than 280° C. and greater than 250° C.It is conceivable for the connection region to be made from the samematerial as the backing element. Preferably, the connection region isconnected at least in a rotationally fixed manner to the backing unit,in particular the backing element, in particular is realized as a singlepiece with the backing unit, in particular the backing element. “As asingle piece” is to be understood to mean, in particular, connected atleast in a materially bonded manner, for example by a welding process,an adhesive process, an injection process and/or another processconsidered appropriate by persons skilled in the art, and/or,advantageously, formed in one piece such as, for example, by beingproduced from a casting and/or by being produced in a single ormulti-component injection process and, advantageously, from a singleblank. It is conceivable for the connection region to be of a multipartdesign. In particular, the abrasion tool device comprises at least oneaxis of motion about which at least the backing unit, in particular thebacking element, the fastening unit and/or the abrasive can be moved, atleast partially, in particular can be driven by means of a drive unit ofthe abrasion power tool. Preferably, the backing element is arrangedtransversely, in particular perpendicularly, to the axis of motion, theplane of main extent of the backing element being in particularperpendicular to the axis of motion. That a straight line and/or aplane, in particular the plane of main extent of the backing element, isaligned “perpendicularly” to a further straight line or a further plane,in particular the axis of motion, is to be understood to mean, inparticular, that the straight line or plane and the further straightline or further plane, in particular as viewed in a projection plane,enclose an angle of 90°, and the angle has a maximum deviation of inparticular less than 8°, advantageously less than 5° and particularlyadvantageously less than 2°. In particular, production tolerances mustbe taken into account in arrangements of components, in perpendicular toeach other. Preferably, the alignment of the contact face isperpendicular to the axis of motion. Preferably, the connection regionand/or the backing element delimit at least one form-fitting recess, inparticular a multiplicity of form-fitting recesses, via which at leastthe backing unit and/or the connection region can be fastened to theabrasion power tool, in particular to a tool receiver of the abrasionpower tool. Preferably, the connection region is designed for connectionto a rotary oscillation drive of the abrasion power tool. In particular,the abrasion tool device is designed to be moved back and forth in anoscillatory manner about the axis of motion by the rotary oscillationdrive, at a frequency of 5000 to 25000 oscillations per minute and witha swivel angle of 0.5° to 7°. Preferably, when the abrasion tool deviceis moving in an oscillatory manner about the axis of motion, theabrasion tool device is acted upon in a constant manner in oppositedirections about the axis of motion. In particular, a large amount offrictional heat is produced when the abrasion tool device is moving inan oscillatory manner with the swivel angle, in particular the swivelangle described above, in particular due to the fact that the abrasiveis being moved over a small surface area, preferably compared to alarger swivel angle.

Preferably, the backing unit has exactly one, in particular plate-like,backing element. It is also conceivable, however, for the backing unitto have more than one backing element, the backing elements being inparticular connected to each other mechanically or in a materiallybonded manner. Preferably, the backing element delimits at least onerecess, in particular a multiplicity of recesses, designed to dissipateheat from the abrasive and/or the backing element to an environmentsurrounding the backing unit. Preferably, the backing element isrealized in such a manner that the recesses extend from a side on whichthe contact face is arranged, preferably over a maximum thickness of thebacking element, to a side of the backing element that faces toward theconnection region. In particular, in a design of the abrasion tooldevice in which the backing element delimits a multiplicity of recesses,it is conceivable for the backing element to be realized in such amanner that the recesses are arranged with an even distribution over thecontact face of the backing element, in particular around the connectionregion and/or the axis of motion. In particular, the backing element hasat least one face that delimits the recess. Preferably, the facedelimiting the recess is arranged, in particular at least partially,perpendicularly to the contact face. It is also conceivable, however,for the face delimiting the recess to be arranged, in particular atleast partially, transversely to the contact face and/or the axis ofmotion. It is conceivable for the faces of the backing element thatdelimit the recesses, in particular as viewed in the plane of mainextent of the backing element, to be of an at least identical basicshape. Preferably, the recess delimited by the backing element isdesigned at least to increase a diffusion of heat generated during anabrasion process, in particular in a processing region of the abrasive,from the contact face to a side of the backing unit, in particular ofthe backing element, that faces away from the fastening unit, preferablyas compared with a design of the backing element in which the backingelement is realized without recesses.

Owing to the design of the abrasion tool device according to theinvention, an advantageously high degree of robustness and stabilitybecomes possible, in particular with regard to temperature-related loadsacting upon the backing unit, in particular the backing element. Anadvantageously high processing accuracy can be achieved, in particularbecause it is possible to achieve an advantageously high resistance ofthe backing element, for example temperature-related deformations and/ordamage. It is thus possible to ensure an advantageously permanentlyhomogeneous processing surface. It is advantageously possible to preventwear phenomena, for example partial melting, of the backing element,which can occur due to the generation of a large amount of heat, inparticular in the case of relatively high contact pressure and/orrelatively long periods of use. It is thus possible, advantageously, toensure that the abrasive is securely connected to the backing element.

It is furthermore proposed that the fastening unit comprise at least onefastening element, for fastening the abrasive to the backing unit, inparticular to the backing element, that is at least mainly, or at leastsubstantially entirely, made from a material having a meltingtemperature of more than 160° C., in particular more than 180° C.,preferably more than 200° C., particularly preferably more than 220° C.,very preferably more than 240° C., and particularly advantageouslypreferably more than 250° C. Preferably, the fastening element is atleast mainly, in particular at least substantially entirely, made fromthe material having a melting temperature that in particular is lessthan 350° C., preferably less than 300° C., particularly preferably lessthan 280° C., and very particularly preferably less than 260° C.Preferably, the fastening element is at least mainly, in particular atleast substantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 160° C., inparticular less than 300° C. and greater than 180° C., preferably lessthan 280° C. and greater than 200° C., particularly preferably less than280° C. and greater than 220° C., and very particularly preferably lessthan 280° C. and greater than 240° C. Preferably, the fastening elementof the fastening unit is made from a material different from that of thebacking element. For example, the fastening element of the fasteningunit is realized as a hook-and-loop fastening, as an adhesive bondedjoint, in particular a re-releasable adhesive bonded joint, as a hook,as a clip, as a vacuum element or the like. Preferably, the fasteningelement of the fastening unit has a basic shape, as viewed in a plane ofmain extent of the fastening element, at least an outer contour of thebasic shape of the fastening element corresponding to an outer contourof the basic shape of the backing element. Preferably, the fasteningelement of the fastening unit is realized so as to correspond to afastening element of the abrasive. In particular in a design of theabrasion tool device in which the fastening element of the fasteningunit is realized as a part of a hook-and-loop fastening, the fasteningelement of the fastening unit is preferably, in particular at leastmainly, made from a fiber-reinforced thermoplastic. In particular in adesign of the abrasion tool device in which the fastening element is ofa design other than an adhesive bonded joint, the fastening unitpreferably has at least one adhesive element that is designed to fastenthe fastening element to the backing element. An advantageously highdegree of robustness and stability of the fastening element of thefastening unit becomes possible, in particular with regard totemperature-related loads acting upon the fastening element of thefastening unit. An advantageously secure connection of the abrasive tothe backing unit, in particular to the backing element, can be achieved.

It is also proposed that the fastening unit comprise at least one, inparticular the aforementioned, adhesive element, that is designed toreplaceably fasten the fastening unit, in particular a fasteningelement, preferably the aforementioned, of the fastening unit that isrealized as a hook-and-loop fastening, to the backing element. Theadhesive element is realized, for example, as a bonding agent.Preferably, the adhesive element is realized so as to be re-releasable.Preferably, the adhesive element is designed to connect the fasteningelement to the backing element in a materially bonded manner.Preferably, the adhesive element extends at least mainly over a face ofthe fastening element that faces toward the backing element and/or overa face of the backing element that faces toward the fastening element.In particular, the adhesive element is arranged with an evendistribution over the face of the fastening element that faces towardthe backing element and/or over the face of the backing element thatfaces toward the fastening element. Preferably, the adhesive element isarranged, on the backing element, on the contact face of the backingelement. Particularly preferably, the adhesive element is made from amaterial having a melting temperature of more than 160° C., inparticular more than 180° C., preferably more than 200° C., particularlypreferably more than 220° C., and very particularly preferably more than240° C. Preferably, the adhesive element is at least mainly, inparticular at least substantially entirely, made from the materialhaving a melting temperature that in particular is less than 350° C.,preferably less than 300° C., particularly preferably less than 280° C.,and very particularly preferably less than 260° C. Preferably, theadhesive element is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 160° C., inparticular less than 300° C. and greater than 180° C., preferably lessthan 280° C. and greater than 200° C., particularly preferably less than280° C. and greater than 220° C., and very particularly preferably lessthan 280° C. and greater than 240° C. Preferably, the adhesive elementhas an at least substantially unchanged holding force, in particularbonding force, at a temperature that is less than the meltingtemperature of the material of the adhesive element. An advantageouslysecure connection of the fastening element to the backing element can beensured. An advantageously secure connection of the abrasive to thebacking element can be ensured, in particular because the fasteningelement of the fastening unit can be changed, for example following weardue to temperature or attrition. In particular, owing to the replaceablefastening of the fastening element, use of a plurality of differentabrasives in combination becomes possible. Advantageously lowmaintenance costs can be achieved, in particular because the fasteningelement can be changed independently of the backing element, enablingthe backing element to be reused.

It is additionally proposed that the backing unit, in particular thebacking element, have a maximum thickness of at most 5 mm, preferably atmost 3 mm, more preferably at most 2 mm, particularly preferably at most1 mm and very particularly preferably at most 0.8 mm, perpendicularly toa, in particular the aforementioned, contact face of the backing unitwith the fastening unit. Preferably, the backing element has a flatnesson the contact face of maximally 8%, preferably maximally 4%, andparticularly preferably maximally 2% of the maximum thickness. Inparticular, the backing element is realized in such a manner that themaximum thickness extends from the contact face to a bearing contactsurface of the backing element at which the connection region bearsagainst the backing element. It is conceivable for the fastening unit,in particular the fastening element of the fastening unit, to have amaximum thickness of at most 4 mm, preferably at most 3 mm, andparticularly preferably at most 2 mm, perpendicularly to a face of thefastening element of the fastening unit that faces toward the contactface of the backing element. In particular, the adhesive element has amaximum thickness of at most 3 mm, preferably at most 2 mm, andparticularly preferably at most 1 mm, perpendicularly to a face of theadhesive element that faces toward the contact face of the backingelement. An advantageously compact abrasion tool device becomespossible. In particular, due to the low maximum thickness of the backingunit, in particular of the backing element, an advantageously highprocessing accuracy can be achieved.

It is also proposed that the abrasion tool device have at least one heattransfer coating, which is arranged between the backing unit, inparticular the backing element, and the fastening unit, preferably onthe contact face, and/or is arranged on a side of the fastening unit, inparticular of the fastening element of the fastening unit, that facesaway from the backing unit, in particular the backing element. A “heattransfer coating” is to be understood to mean, in particular, a coatingdesigned to increase an amount of heat removed via a component, inparticular the backing unit and/or the fastening unit of the abrasiontool device, as compared with an identical, uncoated component.Preferably, the heat transfer coating of the abrasion tool device bearsat least substantially with full surface contact against the contactface and/or against the side of the fastening unit, in particular of thefastening element of the fastening unit, that faces away from thebacking unit, in particular the backing element. That a component, inparticular the heat transfer coating of the abrasion tool device, bears“at least substantially with full surface contact” against anothercomponent, in particular the backing unit, the backing element, thefastening unit and/or the fastening element of the fastening unit, is tobe understood to mean, in particular, that the component has at leastone face that bears with at least 90%, preferably at least 84% andparticularly preferably at least 98% contact against the othercomponent. Preferably, the heat transfer coating of the abrasion tooldevice has a greater thermal conduction characteristic than the backingunit, in particular the backing element, and/or the fastening unit, inparticular the fastening element of the fastening unit. A “thermalconduction characteristic” is to be understood to mean, in particular, acharacteristic of a component, in particular of the heat transfercoating, of the backing unit and/or of the fastening unit, thatinfluences a thermal conductivity of the component. Preferably, thethermal conduction characteristic is proportional to an amount of heatthat is removed via the component per time interval. In particular, thethermal conduction characteristic is realized as a thermal conductivity,in particular a thermal conduction coefficient, as an equivalent thermalconductivity, as an equivalent thermal resistance, as a length-relatedthermal transmission coefficient, as a point-related thermaltransmission coefficient or the like. For example, the heat transfercoating is made at least partially from a metal, in particular aseminoble metal, preferably copper, a noble metal and/or an alkalineearth metal, a carbon compound, in particular graphene, diamond, and/ora graphite close to graphene or the like. Preferably, the heat transfercoating is realized as a thin layer, in particular a flat layer, theheat transfer coating having in particular a maximum thickness of atmost 1 mm, preferably at most 0.5 mm and particularly preferably at most0.3 mm. It is also conceivable for the heat transfer coating to berealized as a structure distributed, in particular evenly, over thecontact face. Alternatively or additionally it is conceivable for theheat transfer coating to be vapor-deposited onto the contact face and/orthe fastening element of the fastening unit, or applied by means of anelectrolysis process. An advantageously high degree of robustness andstability of the abrasion tool device becomes possible, in particularbecause heat generated on the abrasive can be dissipated advantageouslyrapidly via the heat transfer coating. An advantageously high level ofthermal conduction, thermal convection and/or thermal diffusion can beachieved in abrasion applications.

It is furthermore proposed that the fastening unit comprise at leastone, in particular the aforementioned, fastening element, wherein thefastening element of the fastening unit bears, preferably via theadhesive element, at least substantially with full surface contactagainst the backing element, in particular the contact face. Preferably,the fastening unit, in particular the fastening element of the fasteningunit, delimits cut-outs that are designed to dissipate heat from theabrasive and/or the backing unit to an environment surrounding thefastening unit, in particular the fastening element of the fasteningunit. Preferably, the fastening unit, in particular the fasteningelement of the fastening unit, is realized in such a manner that thecut-outs extend from a side on which the fastening element of thefastening unit is arranged on the contact face, over a maximum thicknessof the fastening unit, in particular of the fastening element of thefastening unit, to a side of the fastening unit, in particular of thefastening element of the fastening unit, that faces toward the abrasive.It is conceivable for edges of the fastening element of the fasteningunit that delimit the cut-outs to at least partially overlap and/orborder the recesses and/or form-fitting recesses delimited by thebacking element, as viewed along the contact face. It is conceivable forthe fastening element of the fastening unit and the backing element tobe realized in such a manner that the edges of the fastening element ofthe fastening unit delimiting the cut-outs, and edges of the backingelement delimiting the recesses and/or form-fitting recesses, arearranged at least mainly congruently, as viewed along the contact face.An advantageously high degree of robustness and stability of theabrasion tool device becomes possible, in particular because anadvantageously secure connection of the fastening element of thefastening unit and of the backing element can be achieved.

It is furthermore proposed that the abrasion tool device comprise atleast one protective unit, which is arranged on the backing element andis designed, in particular during an abrasion operation, to protect aworkpiece, the backing element or an external unit, in particular fromdamage, and/or to damp an impact, in particular a direct impact, of thebacking element on the workpiece or on the external unit. Preferably,the protective unit has at least one protective element that is arrangedin particular on an outer side of the backing element, in particular onan outer edge of the backing element and/or on an outer face of thebacking element that faces away from the abrasive and/or the contactface. In particular, the protective element, in particular as viewedperpendicularly to the plane of main extent of the backing element, hasan outer edge or face that has a greater minimum distance than has theouter edge of the backing element from the axis of motion. Preferably,the protective element is arranged at a distance from the contact faceand/or the abrasive. Preferably, the outer face of the backing elementis oriented at least mainly transversely, in particular perpendicularly,or parallel to the plane of main extent of the backing element. Inparticular in a design in which the outer face of the backing element isoriented transversely, in particular perpendicularly, to the plane ofmain extent of the backing element, the outer face of the backingelement is arranged, in particular at least mainly, around the axis ofmotion. In particular, the outer edge is arranged within the plane ofmain extent of the backing element and extends at least substantiallyentirely around the axis of motion. In particular, the external unit isrealized as an object delimiting the workpiece, in particular theworkpiece to be processed, such as, for example, a wall or a ceiling, abody part of a user or the like. Preferably, the outer edge and/or theouter face of the backing element are/is arranged at a distance from thecontact face. It is also conceivable, however, for the outer face of thebacking element to at least partially delimit the contact face.Preferably, the protective element is arranged, along the outer edgeand/or the outer face of the backing element, at least mainly, inparticular at least substantially entirely, around the axis of motion.It is conceivable for the protective element, in particular as viewedperpendicularly to the plane of main extent of the backing element, toat least partially enclose the backing element in a region of the outeredge, the protective element in particular encompassing the outer edgeof the backing element. Particularly preferably, the protective element,as viewed perpendicularly to the plane of main extent of the backingelement, is arranged on the backing element at least mainly, inparticular entirely, on a side of a plane of the backing unit thatextends along the contact face and/or along the outer face of thebacking element that is aligned parallel to the contact face. Inparticular in a design of the protective unit in which the protectiveelement encloses and/or encompasses the outer edge, the protectiveelement preferably extends at least partially, in particular at leastmainly, over a maximum thickness of the backing element at the outeredge. It is conceivable for the protective element to bear exclusivelyagainst the outer face of the backing element that is alignedtransversely, in particular perpendicularly, to the contact face, oragainst the outer face of the backing element that is aligned parallelto the contact face. In particular in a design of the protective unit inwhich the protective element bears exclusively against the outer face ofthe backing element that is aligned parallel to the contact face, theprotective element preferably extends out from the axis of motion,beyond the outer edge of the backing element. Preferably, the protectiveelement, in particular as viewed perpendicularly to the plane of mainextent of the backing element, has a maximum thickness of in particularat least 0.3 mm, preferably at least 0.5 mm, preferably at least 0.8 mmand particularly preferably at least 1 mm. Preferably, a minimumthickness of the protective element is at most 1 cm, preferably at most0.5 mm and preferably at most 3 mm. In particular, the protectiveelement bears against the backing element along the outer edge and/orthe outer face of the backing element. Preferably, the protectiveelement, in particular as viewed perpendicularly to the plane of mainextent of the backing element, has an outer edge or face that has agreater minimum distance than has the outer edge of the backing elementfrom the axis of motion. Preferably, the protective element is connectedas a single piece to the backing element, in particular by means of anadhesive bonded joint, or is fastened to the backing element by means ofa form-fitting and/or force-fitting connection. For example, it isconceivable for the backing element to have, in a region of the outeredge and/or the outer face of the backing element, at least one or moreform-fitting and/or force-fitting extensions designed to fasten theprotective element. Particularly preferably, the protective unit, inparticular the protective element, is made from a material having amelting temperature of more than 160° C., in particular more than 180°C., preferably more than 200° C., particularly preferably more than 220°C., and very particularly preferably more than 240° C. Preferably, theprotective unit, in particular the protective element, is at leastmainly, in particular at least substantially entirely, made from thematerial having a melting temperature that in particular is less than350° C., preferably less than 300° C., particularly preferably less than280° C., and very particularly preferably less than 260° C. Preferably,the protective unit, in particular the protective element, is at leastmainly, in particular at least substantially entirely, made from thematerial having a melting temperature that is less than 350° C. andgreater than 160° C., in particular less than 300° C. and greater than180° C., preferably less than 280° C. and greater than 200° C.,particularly preferably less than 280° C. and greater than 220° C., andvery particularly preferably less than 280° C. and greater than 240° C.

Preferably the protective unit, in particular the protective element, ismade from a plastic, in particular a thermoplastic or a polyamide,and/or of a rubber. For example, the protective unit, in particular theprotective element, is made from a glass-fiber-reinforced plastic, froma partially aromatic polyamide, in particular of the Grivory GV-5H type,or from polyphenylene sulfide. It is conceivable, for example, for theprotective element to be realized as a rubber lip. Preferably, theprotective element is made from a material that has a lesser stiffnessthan the backing element, in particular the material from which thebacking element is made. It is conceivable for the protective unit, inparticular the protective element, to be realized so as to bereplaceable, in particular the protective unit, in particular theprotective element, being separable from the backing element withoutleaving any residue and/or non-destructively. Alternatively, it isconceivable for the protective unit to comprise more than one protectiveelement, arranged along the outer edge and/or the outer face of thebacking element. In particular in a design in which the protective unithas more than one protective element, it is conceivable for theprotective elements to only partially cover the outer edge and/or theouter face of the backing element, for example in a region of corners ofa basic shape of the backing element. Unintentional damage to thebacking element, in particular at the outer edge and/or the outer faceof the backing element, can advantageously be prevented in an abrasionoperation. Advantageously, unintentional damage, in particularscratching or staining, of the workpiece or of the external unit can beprevented.

It is additionally proposed that the protective unit, in particular aprotective element of the protective unit, have a melting temperature ofmore than 220° C., preferably more than 240° C., and more preferablymore than 260° C. Unintentional damage to the backing element, inparticular at the outer edge and/or the outer face of the backingelement, due to temperature-related effects can advantageously beprevented in an abrasion operation. Unintentional damage to theworkpiece or the external unit, in particular melting or rubbing-off,can advantageously be prevented.

It is also proposed that the protective unit comprise at least one, inparticular the aforementioned, protective element, wherein theprotective element, as viewed along a central axis of the backingelement and/or of the protective element, has an outer edge, inparticular the aforementioned, that has a greater minimum distance thanhas an outer edge, in particular the aforementioned, of the backingelement from the central axis of the backing element. The protectiveelement can advantageously prevent an unintentional collision of theouter edge of the backing element against the workpiece or against anobject surrounding the workpiece. Advantageously low maintenance costscan be achieved, in particular because the protective element can bereplaced and/or made from a less expensive material than the backingelement. In particular, the axis of motion comprises the central axis ofthe backing element. Preferably, the central axis of the backing elementand/or of the protective element, as viewed in the plane of main extentof the backing element, comprises a geometric mid-point of a shape ofthe backing element. Preferably, the central axis of the backing elementand/or of the protective element is arranged at least substantiallyperpendicularly to the plane of main extent of the backing element.Preferably, the outer edge of the backing element, as viewed in theplane of main extent of the backing element, is part of an outer contourof the backing element.

It is furthermore proposed that the protective unit comprise at leastone, in particular the aforementioned, protective element that has atleast one outer face which, at least substantially perpendicularly to acentral axis, in particular the aforementioned, of the backing elementand/or of the protective element, has a greater maximum distance thanhas an outer edge, in particular the aforementioned, of the backingelement from the central axis, and which, in particular in at least onestate in which the protective element is arranged on the backingelement, as viewed in a sectional plane comprising the central axis ofthe backing element and/or of the protective element, is at leastsubstantially inclined relative to the central axis of the backingelement and/or of the protective element. It is advantageously possibleto prevent an unintentional collision of the protective element againstthe workpiece or against an object surrounding the workpiece duringtilting of the abrasion power tool and/or of the abrasion tool deviceattached thereto. Preferably, the outer face of the protective elementis at least substantially inclined with respect to the contact face ofthe backing element. “Substantially inclined” is to be understood tomean, in particular, an alignment of a straight line, a plane or adirection, in particular at least one plane that is tangential to theouter face of the protective element, as viewed in a sectional plane ofthe protective element that comprises the central axis, relative toanother straight line, another plane or a reference direction, inparticular the central axis, a straight line that is at leastsubstantially parallel to the central axis and/or the contact face, thestraight line, the plane or the direction with the other straight line,the other plane or the reference direction, in particular as viewed in aprojection plane, spanning an angle from an angular range of from 8° to92°, preferably from 15° to 85°, and more preferably from 20° to 80°. Inparticular, the at least substantially inclined orientation, inparticular of the outer face of the protective element and of thecentral axis, is to be understood to mean an orientation different froma parallel orientation and from a perpendicular orientation. Preferably,the outer edge of the protective element, in particular as viewed in aplane of main extent of the protective element, delimits the outer faceof the protective element at least partially, in particular at leastsubstantially entirely, around the central axis of the backing elementand/or a central axis of the protective element. Preferably, the centralaxis of the protective element, in at least one state in which theprotective element is arranged on the backing element, comprises thecentral axis and/or the axis of motion of the backing element. Inparticular, the central axis of the protective element is arranged atleast substantially perpendicularly to the plane of main extent of theprotective element. Preferably, the plane of main extent of theprotective element, in at least one state in which the protectiveelement is arranged on the backing element, is arranged at leastsubstantially parallel to the plane of main extent of the backingelement. Preferably, the protective element has a connection direction,the protective element being designed to be arranged on, in particularfastened to, the backing element by a movement in the connectiondirection. Preferably, the connection direction is arranged at leastsubstantially parallel to the central axis of the backing element and/orof the protective element. In particular, the connection direction is atleast substantially perpendicular to the plane of main extent of theprotective element. Preferably, the outer face of the protective elementhas, relative to the central axis of the backing element and/or of theprotective element, an angle from an angular range of from 8° to 92°,preferably from 15° to 85° and more preferably from 20° to 80°, that isspanned, in particular in the connection direction, by a, in particularvirtual, point of intersection of a straight line, that extends at leastsubstantially parallel to the central axis and through the outer edge ofthe protective element, and by the outer face of the protective element.Alternatively or additionally, the protective element has at least onefurther outer face that has a greater minimum distance than has theouter edge of the backing element from the central axis of the backingelement and that, in particular in at least one state in which theprotective element is arranged on the backing element, as viewed in asectional plane comprising the central axis of the backing element, isat least substantially inclined relative to the central axis of thebacking element. Preferably, the outer face of the protective elementhas, relative to the central axis of the backing element and/or of theprotective element, an angle from an angular range of from 8° to 92°,preferably from 15° to 85° and more preferably from 20° to 80°, that isspanned, in particular contrary to the connection direction, by a, inparticular virtual, point of intersection of a straight line, thatextends at least substantially parallel to the central axis and throughthe outer edge of the protective element, and by the further outer face.Preferably, the further outer face of the protective element is arrangedon a side of the protective element that faces away from the backingelement, in particular the contact face. In particular, the furtherouter face of the protective element is arranged on an underside of theprotective element. Preferably, the further outer face of the protectiveelement, as viewed at least substantially perpendicularly to the centralaxis of the backing element and/or of the protective element, delimits acontour of the protective element, in particular a contour delimitingthe protective element in the connection direction. Preferably, theouter face and the further outer face of the protective element arearranged at a distance from each other on the protective element. It isalso conceivable, however, for the outer face and the further outer faceof the protective element to at least partially delimit each other, inparticular on one side in each case. Preferably, the outer face and/orthe further outer face of the protective element are/is realized with aflat surface. It is also conceivable, however, for the outer face and/orthe further outer face of the protective element to be curved.

It is also proposed that the protective unit comprise at least one, inparticular the aforementioned, protective element, that extends, atleast substantially perpendicularly to a, in particular theaforementioned, central axis of the backing element and/or of theprotective element, at least mainly, in particular at leastsubstantially entirely, over a maximum extent of the backing element. Anadvantageously stable and robust design of the protective elementbecomes possible, in particular because the protective element can beadvantageously supported over the maximum extent by the backing element.Advantageously extensive protection of the backing element by theprotective unit can be achieved. Preferably, the protective elementsurrounds the backing element, in particular when the protective unit isin an assembled state, as viewed along the central axis of the backingelement and/or of the protective element, at least mainly, in particularat least substantially entirely. Preferably, the protective element, inparticular when the protective unit is in an assembled state and/or isarranged on the backing element, extends at least mainly, in particularat least substantially entirely, along an, in particular upper, outeredge of the backing element, the protective element in particularbearing against the outer edge of the backing element. It is conceivablefor the protective unit to comprise more than one protective element,each bearing against the outer edge of the backing element and, inparticular, realized at a distance from each other. It is alsoconceivable, however, for the protective elements to be arranged againsteach other and/or connected to each other for the purpose of arrangementon and/or fastening to the backing element.

It is additionally proposed that the backing element realize at leastone holding means that is designed to hold the protective unit, inparticular a protective element, in particular the aforementioned, ofthe protective unit, on the backing element in a force-fitting and/orform-fitting manner. An advantageously stable connection between thebacking element and the protective element becomes possible. It isadvantageously possible to dispense with additional fastening elementsfor holding the protective element on the backing element. Thus, anadvantageously low number of components of the abrasion tool device, andthus also advantageously low production costs, can be achieved.Particularly preferably, the backing element and the at least oneholding means are in each case realized as a single part. In particular,the holding means is realized as an extension, in particular a pin, aprotrusion or the like, or as a recess. In particular, the protectiveelement is realized so as to correspond to the backing element and theholding means, and is designed to be connected to the backing element ina force-fitting and/or form-fitting manner, in particular via theholding means. Preferably, the protective element realizes at least onecounter-holding means that is designed to act in combination with theholding means for the purpose of connecting the protective element andthe backing element in a force-fitting and/or form-fitting manner, inparticular when the protective element is arranged on the backingelement. Particularly preferably, the protective element and the atleast one counter-holding means are realized as a single part. Forexample, the counter-holding means, in particular corresponding to theholding means, is realized as an extension, in particular a pin, aprotrusion or the like, or as a recess. Preferably, the holding means isarranged, in particular as viewed from the central axis of the backingelement, in an outer peripheral region of the backing element, which inparticular adjoins the outer edge of the backing element. In particular,the counter-holding means, in particular as viewed from the central axisof the protective element, is arranged in an outer peripheral region ofthe protective element. In particular, the at least one holding means isarranged on a side of the backing element that faces away from thecontact face. Preferably, the at least one counter-holding means isarranged on a side of the protective element arranged in the connectiondirection. It is conceivable for the backing element to comprise morethan one holding means. In particular, it is conceivable for theprotective element to comprise more than one counter-holding means. Inparticular, a number of holding means corresponds to a number ofcounter-holding means. In a preferred design, the holding means and/orthe counter-holding means are evenly distributed around a central axisof the backing element and/or of the protective element.

It is furthermore proposed that the fastening unit comprise at least oneintermediate element that is designed to be arranged between the backingelement and the abrasive so as to be in particular at leastsubstantially non-destructively removable and/or replaceable at leastsubstantially without use of any tools, wherein the intermediate elementis made from a material having a melting temperature of more than 180°C., preferably more than 200° C., particularly preferably more than 220°C., very preferably more than 240° C., and particularly advantageouslypreferably more than 250° C. An advantageously high degree offlexibility of the abrasion tool device becomes possible, in particularin respect of application possibilities and combinations with differentdesigns of abrasive, with preferably, at the same time, anadvantageously unaltered high degree of resistance in respect oftemperature-related damage. It becomes possible to achieve anadvantageously application-specific and/or situation-specific adjustmentof external dimensions of the abrasion tool device, of a density of theabrasion tool device, of a shape of the abrasion tool device, inparticular in respect of supporting of differently shaped abrasives, ofremoval of heat to the backing element or the like. For abrasion incorners, for example, the intermediate element can be used to convert arounded shape of the backing element, advantageously simply and rapidly,in particular without disassembling the entire abrasion tool device,into an at least partially angular support surface for receiving theabrasive. “Substantially non-destructive” is to be understood to mean,in particular, that a component, in particular the intermediate element,is not irreversibly changed, in particular damaged, plastically deformedor destroyed, during an activity, in particular during a removal and/orreplacement of the intermediate element. In particular, an at leastsubstantially non-destructive elastic bending of the component isconceivable. An activity that can be performed “substantially withoutuse of any tools”, in particular a removal and/or replacement of theintermediate element, is to be understood to mean, in particular, as anactivity that can be performed without the aid of tools, such asparting-off tools such as, for example, a saw, a wedge or the like,and/or chemical parting-off agents such as, for example, solvents or thelike. Preferably, the intermediate element can be fastened to thebacking element and/or the abrasive via at least one fastening elementand/or a bonding agent of the fastening unit. It is conceivable forthe/a heat transfer coating to be arranged on the intermediate element,in particular on an underside of the intermediate element that facestoward the abrasive. For example, the intermediate element can befastened to the backing element and/or the abrasive via a hook-and-loopfastening of the fastening unit. In particular, a fastening means of thehook-and-loop fastening is connected to the intermediate element in amaterially bonded manner. For example, the intermediate element is madefrom at least one plastic, in particular polyurethane, or of at leastone metal. Particularly preferably, the intermediate element is madefrom materials/a material other than a foam. In particular in a designin which the intermediate element is made from a metal, a maximumthickness of the intermediate element is preferably less than 3 mm,preferably less than 2 mm and preferably less than 1.5 mm. In addition,for optimized heat distribution away from the abrasive, it isconceivable for the intermediate element to comprise cut-outs orprotuberances that are arranged in particular at least partially on anunderside of the intermediate element that faces toward the abrasive.Preferably, the intermediate element and the backing element are of amodular design, it being conceivable for the abrasion tool device to beoperated with and without an intermediate element. Preferably, theintermediate element is at least substantially plate-like. A“substantially plate-like” component, in particular the intermediateelement, is to be understood to mean, in particular, a three-dimensionalelement that, as viewed in a development in a plane, has a non-circularcross-sectional area in a cross-section perpendicular to the plane and,perpendicularly to the plane, has a material thickness that inparticular is at least substantially constant and that is less than 50%,preferably less than 25%, and particularly preferably less than 10% ofan areal extent of the three-dimensional element parallel to the plane,in particular of a smallest areal extent of the element parallel to theplane. In particular, the intermediate element is realized as anintermediate pad or an intermediate plate. Preferably, the intermediateelement is designed to define a shape of the abrasive supported by thebacking element, in particular the contact face of the backing element.In particular, the intermediate element has a seating face designed forarrangement of the intermediate element on the backing element. Inparticular, the seating face of the intermediate element is arranged ona side of the intermediate element that faces toward the backingelement, in particular when the abrasion tool device is in an assembledstate. Preferably, the seating face of the intermediate element, inparticular as viewed along the central axis of the backing element, isat least substantially identical in shape to the contact face of thebacking element. Preferably, the intermediate element comprises acontact face designed for arrangement of the abrasive on theintermediate element. Preferably, the seating face of the intermediateelement, in particular as viewed along a central axis of theintermediate element, is at least substantially identical in shape tothe abrasive, in particular to a base surface of the abrasive in a planeof main extent of the abrasive. It is conceivable for the contact faceand the seating face of the intermediate element to be at leastsubstantially identical, or to differ, in design. Preferably, it isconceivable for the contact face and the seating face of theintermediate element to differ from each other in their basic geometricshape. For example, one shape of the seating face of the intermediateelement is rounded or round, in particular in the shape of circularsurface, while a shape of the contact face of the intermediate elementhas at least one corner, in particular for processing at a corner of aworkpiece or an area surrounding the workpiece. Alternatively oradditionally, it is conceivable for the intermediate element to bedesigned for adapting a stiffness for supporting the abrasive element,in particular without removing and/or replacing the backing element. Itis conceivable for the intermediate element to have a stiffness thatdiffers from a stiffness of the backing element and/or a modulus ofelasticity that differs from a modulus of elasticity of the backingelement, for example to protect a workpiece to be processed that has aparticularly soft or particularly hard surface for processing. Inparticular, abrasion power tools each have at least one limit value fora maximum moment of inertia of the abrasion tool device, in particularat least of the backing unit, the fastening unit and the abrasive, inrespect of a rotation about the axis of motion and/or the central axisof the backing element. Preferably, a ratio of a moment of inertia ofthe backing element, with respect to a rotation about the axis ofmotion, and of the limit value for a maximum moment of inertia of theabrasion tool device is at most 0.75, preferably at most 0.6, and morepreferably at most 0.5. In particular, a ratio of the moment of inertiaof the backing element and of the limit value for a maximum moment ofinertia of the abrasion tool device is at least 0.1, preferably at least0.2, and more preferably at least 0.3. Preferably, a proportion of themaximum moment of inertia of the abrasion tool device, which correspondsto a difference of the limit value for a maximum moment of inertia ofthe abrasion tool device and the moment of inertia of the backingelement in respect of a rotation about the axis of motion, is availablefor a moment of inertia of the fastening unit, in particular of theintermediate element, and of the abrasive with respect to a rotationabout the axis of motion. Preferably, a ratio of a common moment ofinertia of the fastening unit, in particular the intermediate element,and the abrasive with respect to a rotation about the axis of motion andof the limit value for a maximum moment of inertia of the abrasion tooldevice corresponds to a value from a range of values of from 0.25 to0.9, preferably from 0.4 to 0.8, and more preferably from 0.5 to 0.7.Preferably, a quotient of the moment of inertia of the backing elementin respect of a rotation about the axis of motion and a weight of thebacking element corresponds to a value from a range of values of from250 mm² to 1800 mm², preferably from 250 mm² to 2000 mm², and morepreferably from 250 mm² to 2500 mm². Preferably, a ratio of the momentof inertia of the backing element in respect of a rotation about theaxis of motion and a maximum surface area of the contact face of thebacking element corresponds to a value from a range of values of from0.001 kg to 0.01 kg, preferably from 0.003 kg to 0.008 kg, and morepreferably from 0.004 kg to 0.006 kg.

It is additionally proposed that the backing element be realized as astrut structure. Preferably, the strut structure is realized in themanner of a skeleton. Preferably, the strut structure is composed of amultiplicity of identical elementary cells or elementary meshes, whichin particular are each composed of a plurality of struts. An “elementarycell” is to be understood to mean, in particular, a three-dimensionalbasic body, wherein a uniform grid or a uniform structure, in particularthe strut structure, can be formed by a juxtaposition of a multiplicityof basic bodies in at least one direction in space. An “elementary mesh”is to be understood to mean, in particular, a two-dimensional basicbody, in particular a two-dimensional arrangement, wherein a uniformgrid or a uniform structure, in particular the strut structure, can beformed by a juxtaposition of a multiplicity of basic bodies in at leastone direction along a plane. Preferably, the backing element is composedof more than one layer of elementary cells or elementary meshes of thestrut structure. It is conceivable for the strut structure to becomposed of a multiplicity of at least more than one elementary cell orelementary mesh of the strut structure in each case. It is conceivablefor the elementary cells or elementary meshes of the strut structure, asviewed in a plane of main extent of the backing unit, to have ann-cornered basic shape such as, for example, a rectangular or honeycombbasic shape. For example, the strut structure is realized as a cubicgrid, with struts arranged along the grid lines. It is also conceivablefor the strut structure to have a honeycomb structure at least along anaxis of the backing element that in particular is alignedperpendicularly to the contact face, wherein in particular theelementary cells of the strut structure each have the shape of anequilateral hexagon in at least one sectional plane. In particular in adesign of the backing element in which the backing element is composedof more than one layer of elementary meshes of the strut structure, itis conceivable for layers of elementary meshes to be arranged offsetfrom one another, in particular along an axis of the backing elementthat is aligned perpendicularly to the contact face. Alternatively oradditionally, it is conceivable for the layers of the elementary meshesto extend parallel to the contact face of the backing element and, inparticular, to be arranged along an axis of the backing element that isaligned perpendicularly to the contact face, alternately from layer tolayer in an offset manner along at least one axis aligned parallel tothe contact face. In particular, it is conceivable for the strutstructure to have a graphite structure. An advantageously high degree ofrobustness and stability of the abrasion tool device becomes possible,in particular with a simultaneously advantageously low mass andadvantageously high thermal conduction of the backing element.

It is also proposed that the backing unit comprise at least one supportelement, wherein the support element at least mainly encloses thebacking element, and wherein the support element has a thermalconduction characteristic that is greater than a thermal conductioncharacteristic of the backing element. Preferably, the support elementis designed to dissipate heat generated at the abrasive. In particular,the support element is designed to protect the backing element againstimpacts and/or plastic deformations, in particular of the individualstruts, in a design of the abrasion tool device in which the backingelement is realized as a strut structure. In particular in a design ofthe abrasion tool device in which the backing element is realized as astrut structure, the backing element is preferably arranged, inparticular as an endoskeleton, at least mainly, within the supportelement. Preferably, the support element is at least mainly, preferablyat least substantially entirely, made from the material having a meltingtemperature of more than 160° C., in particular more than 180° C.,preferably more than 200° C., particularly preferably more than 220° C.,very particularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. Preferably, the supportelement is at least mainly, in particular at least substantiallyentirely, made from the material having a melting temperature that inparticular is less than 350° C., preferably less than 300° C.,particularly preferably less than 280° C., and very particularlypreferably less than 260° C. Preferably, the support element is at leastmainly, in particular at least substantially entirely, made from thematerial having a melting temperature that is less than 350° C. andgreater than 160° C., in particular less than 300° C. and greater than180° C., preferably less than 280° C. and greater than 200° C.,particularly preferably less than 280° C. and greater than 220° C., andvery particularly preferably less than 280° C. and greater than 240° C.In particular, the support element is at least mainly made from a foamor other plastic. Preferably, the backing element has a greaterstiffness than the support element. An advantageously high degree ofrobustness and stability of the abrasion tool device becomes possible.

Also proposed is an abrasive, comprising at least one working face thathas a multiplicity of abrasive elements, and comprising at least oneinterface or connection face for arrangement on or connection to thefastening unit of an abrasion tool device according to the invention,wherein the interface or connection face has at least one, preferablythe aforementioned, fastening element, in particular realized as ahook-and-loop fastening, which is made in particular at least mainly,preferably at least substantially entirely, from a material having amelting temperature of more than 160° C., in particular more than 180°C., preferably more than 200° C., particularly preferably more than 220°C., very particularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. Preferably, the fasteningelement of the abrasive is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that in particular is less than 350° C., preferably lessthan 300° C., particularly preferably less than 280° C., and veryparticularly preferably less than 260° C. Preferably, the fasteningelement of the abrasive is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 160° C., inparticular less than 300° C. and greater than 180° C., preferably lessthan 280° C. and greater than 200° C., particularly preferably less than280° C. and greater than 220° C., and very particularly preferably lessthan 280° C. and greater than 240° C. Preferably, the abrasive isrealized as a replaceable abrasive. In particular in a design of theabrasive in which the fastening element of the abrasive is realized as apart of a hook-and-loop fastening, the fastening element of the abrasiveis preferably, in particular at least mainly, made from afiber-reinforced thermoplastic. Preferably, the interface or theconnection face, in particular the fastening element of the abrasive,bears at least substantially with full surface contact against theworking face, in particular on a side of the working face that facesaway from the abrasive elements. Preferably, the interface or theconnection face, in particular the fastening element of the abrasive,extends at least mainly over an entire side of the working face.Preferably, the working face and/or the interface or connection face hasa basic shape, as viewed in a plane of main extent of the abrasive, atleast one outer contour of the basic shape of the working face and/or ofthe interface or connection face corresponding to an outer contour ofthe basic shape of the backing element. Alternatively or additionally,it is conceivable for the interface or the connection face, inparticular the fastening element, to be arranged in an evenlydistributed manner over an entire side of the working face. Anadvantageously high degree of robustness and stability becomes possible,in particular with regard to temperature-related loads acting upon thefastening element of the abrasive. The abrasive can be used for anadvantageously long period of time. An advantageously secure connectionof the abrasive to the abrasion tool device becomes possible.

It is furthermore proposed that the abrasive have at least one heattransfer coating arranged between the working face and the fasteningelement. In particular, the heat transfer coating is at leastsubstantially similar to the heat transfer coating, described above, ofthe abrasion tool device. Preferably, the heat transfer coating of theabrasive is designed to remove heat generated at the working face duringan abrasion process. Preferably, the heat transfer coating of theabrasive bears at least substantially with full surface contact againstthe working face and/or the fastening element of the abrasive.Preferably, the heat transfer coating of the abrasive has a higherthermal conduction characteristic than the working face and/or thefastening element of the abrasive. An advantageously high degree ofrobustness and stability of the abrasive becomes possible, in particularbecause heat generated at the abrasive can advantageously be dissipatedrapidly via the heat transfer coating. An advantageously high level ofthermal conduction, thermal convection and/or thermal diffusion can beachieved in abrasion applications.

Also proposed is an abrasion tool system, comprising at least oneabrasion tool device according to the invention, and comprising at leastone abrasive according to the invention. Preferably, the abrasive isconnected to the abrasion tool device, in particular replaceably, in atleast one state of assembly of the abrasion tool system. Anadvantageously high degree of robustness and stability of the abrasiontool system becomes possible, in particular with regard totemperature-related loads during an abrasion process. An advantageouslyhigh processing accuracy can be achieved, in particular because it ispossible to achieve an advantageously high resistance of the backingelement, for example temperature-related deformations and/or damage. Itis thus possible to ensure an advantageously permanently homogeneousprocessing surface. It is advantageously possible to prevent wearphenomena, for example partial melting, of the backing element, whichcan occur due to the generation of a large amount of heat, in particularin the case of relatively high contact pressure and/or relatively longperiods of use. It is thus possible, advantageously, to ensure that theabrasive is securely connected to the backing element.

The abrasion tool device according to the invention, the abrasiveaccording to the invention and/or the abrasion tool system according tothe invention are/is not intended in this case to be limited to theapplication and embodiment described above. In particular, the abrasiontool device according to the invention, the abrasive according to theinvention and/or the abrasion tool system according to the invention mayhave a number of individual elements, components and units that differsfrom a number stated herein, in order to fulfill an operating principledescribed herein. Moreover, in the case of the value ranges specified inthis disclosure, values lying within the stated limits are also to bedeemed as disclosed and applicable in any manner.

DRAWINGS

Further advantages are given by the following description of thedrawings. Four exemplary embodiments of the invention are represented inthe drawings. The drawings, the description and the claims containnumerous features in combination. Persons skilled in the art will alsoexpediently consider the features individually and combine them tocreate appropriate further combinations.

In the drawings:

FIG. 1 shows a schematic perspective view of an abrasion tool systemaccording to the invention comprising an abrasion tool device accordingto the invention and an abrasive according to the invention,

FIG. 2 shows a schematic exploded representation of the abrasion tooldevice according to the invention,

FIG. 3 shows a schematic representation of a cross-section of theabrasion tool system according to the invention comprising the abrasiontool device according to the invention and the abrasive according to theinvention,

FIG. 4 shows a schematic perspective view of a backing element realizedas a strut structure and of a support element of a backing unit of analternative design of an abrasion tool device according to theinvention,

FIG. 5 shows a schematic representation of a backing element, realizedas a strut structure, of a backing unit of a further alterative designof an abrasion tool device according to the invention, in a top view,

FIG. 6 shows a schematic representation of an alternative design of anabrasion tool system according to the invention comprising anotheralternative design of an abrasion tool device according to the inventionand an alternative design of an abrasive according to the invention, ina top view,

FIG. 7 shows a schematic sectional view of a protective unit and of abacking element of a further alternative design of an abrasion tooldevice according to the invention, through a central axis of a backingelement of the abrasion tool device

FIG. 8 shows a perspective representation of the protective unit and ofthe backing element of the further alternative design of the abrasiontool device according to the invention, and

FIG. 9 shows a schematic detail of a cross-section of another furtherdesign of an abrasion tool system according to the invention comprisingan abrasion tool device according to the invention that comprises anintermediate element, and comprising an abrasive according to theinvention.

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

FIG. 1 shows an abrasion tool system 10 a in an assembled state. Theabrasion tool system 10 a has an abrasion tool device 12 a, realized anabrasion plate, which comprises a connection region 14 a. The connectionregion 14 a is designed to connect the abrasion tool system 10 a to anabrasion power tool. The abrasion tool device 12 a comprises a backingunit 16 a, realized as a support plate, and a fastening unit 18 a fordetachably fastening an abrasive 20 a, realized as an abrasive paper, ofthe abrasion tool system 10 a to the backing unit 16 a, the backing unit16 a comprising at least one backing element 22 a on which the abrasive20 a is arranged via the fastening unit 18 a. In the assembled state,the abrasive 20 a is fastened to the backing unit 16 a, in particularthe backing element 22 a, via the fastening unit 18 a. The backing unit16 a comprises exactly one backing element 22 a, which is made from amaterial having a melting temperature of more than 180° C., preferablymore than 200° C., particularly preferably more than 220° C., veryparticularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. Preferably, the backingelement 22 a is at least mainly, in particular at least substantiallyentirely, made from the material having a melting temperature that inparticular is less than 350° C., preferably less than 300° C.,particularly preferably less than 280° C., and very particularlypreferably less than 260° C. Preferably, the material from which thebacking element 22 a is made has a melting temperature that is less than350° C. and greater than 180° C., in particular less than 300° C. andgreater than 200° C., preferably less than 280° C. and greater than 220°C., particularly preferably less than 280° C. and greater than 240° C.,and very particularly preferably less than 280° C. and greater than 250°C. In particular, the backing element 22 a is made from a metal. Thebacking element 22 a is plate-like. The connection region 14 a delimitsa multiplicity of form-fitting recesses 24 a, via which the abrasiontool system 10 a, in particular at least the backing unit 16 a and theconnection region 14 a, can be fastened to the abrasion power tool, inparticular to a tool receiver of the abrasion power tool. The connectionregion 14 a is made from a material, in particular a metal, that has amelting temperature of more than 180°, preferably more than 200° C.,particularly preferably more than 220° C., very particularly preferablymore than 240° C., and particularly advantageously preferably more than250° C. Preferably, the connection region 14 a is at least mainly, inparticular at least substantially entirely, made from the materialhaving a melting temperature that in particular is less than 350° C.,preferably less than 300° C., particularly preferably less than 280° C.,and very particularly preferably less than 260° C. Preferably, theconnection region 14 a is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 180° C., inparticular less than 300° C. and greater than 200° C., preferably lessthan 280° C. and greater than 220° C., particularly preferably less than280° C. and greater than 240° C., and very particularly preferably lessthan 280° C. and greater than 250° C. The connection region 14 a isconnected at least in a rotationally fixed manner to the backing element22 a. The abrasion tool system 10 a, in particular the abrasion tooldevice 12 a, comprises an axis of motion 26 a about which at least thebacking unit 16 a, in particular the backing element 22 a, the fasteningunit 18 a and the abrasive 20 a can be moved, at least partially, andcan be driven by means of a drive unit of the abrasion power tool. Thebacking element 22 a is arranged perpendicularly to the axis of motion26 a, a plane of main extent of the backing element 22 a being inparticular arranged perpendicularly to the axis of motion 26 a. However,other designs of the abrasion tool system 10 a, in particular of theabrasion tool device 12 a and/or of the abrasive 20 a, are alsoconceivable.

The abrasion tool device 12 a has a protective unit 80 a, which isarranged on the backing element 22 a and is designed to protect aworkpiece or an external unit, in particular from damage, and/or to dampan impact, in particular a direct impact, of the backing element 22 a onthe workpiece or on the external unit, in particular during an abrasionoperation, the workpiece and the external unit in particular not beingshown in FIG. 1.

The protective unit 80 a comprises a protective element 84 a arranged onan outer side 88 a of the backing element 22 a. The protective element84 a is arranged on an outer edge 82 a of the backing element and on twoouter faces 90 a, 92 a of the backing element 22 a that face away fromthe abrasive 20 a and the contact face 34 a. The protective element 84 ais arranged at a distance from the contact face 34 a and the abrasive 20a. Preferably, one outer face 90 a of the two outer faces 90 a, 92 a isaligned transversely, in particular perpendicularly, to the contact face34 a and at least partially delimits the contact face 34 a. Preferably,a further outer face 92 a of the two outer faces 90 a, 92 a is alignedparallel to the contact face 34 a. The outer face 90 a extends at leastsubstantially entirely around the axis of motion 26 a. In particular,the outer edge 82 a is arranged within the plane of main extent of thebacking element 22 a and extends at least substantially entirely aroundthe axis of motion 26 a. Preferably, the outer edge 82 a and the outerface 92 a that is aligned parallel to the contact face 34 a are arrangedat a distance from the contact face 34 a. The protective element 84 a isarranged, along the outer edge 82 a of the backing element 22 a, atleast substantially entirely around the axis of motion 26 a. Theprotective element 84 a, in particular as viewed perpendicularly to theplane of main extent of the backing element 22 a, at least partiallyencloses the backing element 22 a in a region of the outer edge 82 a. Inparticular, the protective element 84 a encompasses the outer edge 82 aof the backing element 22 a. The protective element 84 a, as viewedperpendicularly to the plane of main extent of the backing element 22 a,is arranged on the backing element 22 a at least mainly, in particularentirely, on a side of a plane of the backing unit 16 a that extendsalong the contact face 34 a. The protective element 84 a extends atleast mainly, in particular at least substantially entirely, over amaximum thickness 50 a of the backing element 22 a at the outer edge 82a. The protective element 84 a, in particular as viewed perpendicularlyto the plane of main extent of the backing element 22 a, has a maximumthickness 86 a of in particular at least 0.3 mm, preferably at least 0.5mm, preferably at least 0.8 mm, and particularly preferably at least 1mm. The protective element 84 a bears, along the outer edge 82 a of thebacking element 22 a, against the outer face 90 a and the further outerface 92 a of the backing element 22 a. The protective element 84 a isconnected as a single piece to the backing element 22 a, in particularby means of an adhesive bonded joint. It is also conceivable, however,for the protective element 84 a to be fastened to the backing element 22a by means of a form-fitting and/or force-fitting connection, inparticular the backing element 22 a having, in a region of the outeredge 82 a, the outer face 90 a and/or the further outer face 92 a, atleast one or more form-fitting and/or force-fitting extensions designedto fasten the protective element 84 a. The protective unit 80 a, inparticular the protective element 84 a, is made from a material having amelting temperature of more than 160° C., in particular more than 180°C., preferably more than 200° C., particularly preferably more than 220°C., and very particularly preferably more than 240° C. The protectiveunit 80 s, in particular the protective element 84 a, is at leastmainly, in particular at least substantially entirely, made from thematerial having a melting temperature that in particular is less than350° C., preferably less than 300° C., particularly preferably less than280° C., and very particularly preferably less than 260° C. Theprotective unit 80 a, in particular the protective element 84 a, is atleast mainly, in particular at least substantially entirely, made fromthe material having a melting temperature that is less than 350° C. andgreater than 160° C., in particular less than 300° C. and greater than180° C., preferably less than 280° C. and greater than 200° C.,particularly preferably less than 280° C. and greater than 220° C., andvery particularly preferably less than 280° C. and greater than 240° C.The protective unit 80 a, in particular the protective element 84 a, ismade from a plastic, in particular a thermoplastic. It is alsoconceivable, however, for the protective unit 80 a, in particular theprotective element 84 a, to be made from a polyamide and/or from arubber. Preferably, the protective element 84 a is made from a materialthat has a lesser stiffness than the backing element 22 a, in particularthe material from which the backing element 22 a is made. The protectiveunit 80 a, in particular the protective element 84 a, is realized so asto be replaceable, in particular the protective unit 80 a, in particularthe protective element 84 a, being separable from the backing element 22a without leaving any residue and/or non-destructively. However, otherdesigns of the protective unit 80 a are also conceivable, for examplecomprising more than one protective element 84 a, arranged along theouter edge 82 a, the outer face 90 a and/or the further outer face 92 a.In particular in a design in which the protective unit 80 a has morethan one protective element 84 a, it is conceivable for the protectiveelements 84 a to only partially cover the outer edge 82 a, the outerface 90 a and/or the further outer face 92 a of the backing element 22a, for example in a region of corners of a basic shape of the backingelement 22 a. Alternatively, it is conceivable for the protectiveelement 84 a to be arranged, in particular exclusively, on the backingelement 22 a via the further outer face 92 a, in particular theprotective element 84 a, as viewed perpendicularly to the plane of mainextent of the backing element 22 a, extending out from the axis ofmotion 26 a, beyond the outer edge 82 a of the backing element 22 a.Alternatively, it is conceivable for the protective element 84 a to bearranged, in particular exclusively, on the backing element 22 a, on theouter face 90 a of the backing element 22 a. The protective element 84a, in particular as viewed perpendicularly to the plane of main extentof the backing element 22 a, has an outer edge or face that has agreater minimum distance than have/has the outer edge 82 a and/or theouter face 90 a of the backing element 22 a from the axis of motion.

FIG. 2 shows an exploded diagram of the abrasion tool device 12 a. Thefastening unit 18 a comprises a fastening element 28 a for fastening theabrasive 20 a to the backing unit 16 a, in particular to the backingelement 22 a, which is made from a material having a melting temperatureof more than 160° C., in particular more than 180° C., preferably morethan 200° C., particularly preferably more than 220° C., veryparticularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. Preferably, the fasteningelement 28 a is at least mainly, in particular at least substantiallyentirely, made from the material having a melting temperature that inparticular is less than 350° C., preferably less than 300° C.,particularly preferably less than 280° C., and very particularlypreferably less than 260° C. Preferably, the fastening element 28 a isat least mainly, in particular at least substantially entirely, madefrom the material having a melting temperature that is less than 350° C.and greater than 160° C., in particular less than 300° C. and greaterthan 180° C., preferably less than 280° C. and greater than 200° C.,particularly preferably less than 280° C. and greater than 220° C., andvery particularly preferably less than 280° C. and greater than 240° C.The fastening element 28 a of the fastening unit 18 a is made from amaterial different from that of the backing element 22 a. The axis ofmotion 26 a extends centrally through the backing element 22 a and thefastening element 28 a of the fastening unit 18 a. The fastening element28 a of the fastening unit 18 a is realized as part of a hook-and-loopfastening. The fastening element 28 a of the fastening unit 18 a has abasic shape, as viewed in a plane of main extent of the fasteningelement 28 a of the fastening unit 18 a, at least an outer contour ofthe basic shape of the fastening element 28 a of the fastening unit 18 acorresponding to an outer contour of a basic shape of the backingelement 22 a. The fastening element 28 a of the fastening unit 18 a isrealized so as to correspond to a fastening element 78 a of the abrasive20 a. The fastening element 28 a of the fastening unit 18 a is at leastmainly made from a fiber-reinforced thermoplastic.

The fastening unit 18 a has an adhesive element 30 a realized as abonding agent, which is designed to replaceably fasten the fasteningelement 28 a of the fastening unit 18 a, realized as a hook-and-loopfastening, to the backing element 22 a. The adhesive element 30 a isdesigned to connect the fastening element 28 a of the fastening unit 18a to the backing element 22 a in a materially bonded manner. In FIG. 2,the adhesive element 30 a is shown arranged on the fastening element 28a of the fastening unit 18 a. The adhesive element 30 a extends at leastmainly over a face 32 a of the fastening element 28 a of the fasteningunit 18 a that faces toward the backing element 22 a. In particular, theadhesive element 30 a is arranged with an even distribution over theface of the fastening element 28 a of the fastening unit 18 a that facestoward the backing element 22 a. The adhesive element 30 a is made froma material having a melting temperature of more than 160° C., inparticular more than 180° C., preferably more than 200° C., particularlypreferably more than 220° C., very particularly preferably more than240° C., and particularly advantageously preferably more than 250° C.Preferably, the adhesive element 30 a is at least mainly, in particularat least substantially entirely, made from the material having a meltingtemperature that is in particular less than 350° C., preferably lessthan 300° C., particularly preferably less than 280° C., and veryparticularly preferably less than 260° C. Preferably, the adhesiveelement 30 a is at least mainly, in particular at least substantiallyentirely, made from the material having a melting temperature that isless than 350° C. and greater than 160° C., in particular less than 300°C. and greater than 180° C., preferably less than 280° C. and greaterthan 200° C., particularly preferably less than 280° C. and greater than220° C., and very particularly preferably less than 280° C. and greaterthan 240° C. The backing element 22 a has a contact face 34 a that isrealized as a flat face. The fastening unit 18 a is arranged on thebacking element 22 a via the contact face 34 a. The fastening element 28a of the fastening unit 18 a and the adhesive element 30 a are arranged,on the backing element 22 a, on the contact face 34 a of the backingelement 22 a. Other designs of the fastening unit 18 a, in particular ofthe adhesive element 30 a, are also conceivable, in particular theadhesive element 30 being realized in such a manner that the fasteningelement 28 a is non-detachably connected to the backing element 22 a viathe adhesive element 30 a. The contact face 34 a is arranged on a sideof the backing unit 16 a, in particular of the backing element 22 a,that faces away from the connection region 14 a. The backing element 22a, as viewed in the plane of main extent of the backing element 22 a,has a triangular basic shape, in particular with corners of the basicshape being rounded.

The backing element 22 a delimits six recesses 36 a designed todissipate heat from the abrasive 20 a and/or the backing element 22 a toan environment surrounding the backing unit 16 a. The backing element 22a is realized in such a manner that the recesses 36 a extend from a sideon which the contact face 34 a is arranged, preferably over a maximumthickness of the backing element 22 a, to a side of the backing element22 a that faces toward the connection region 14 a. The backing element22 a is realized in such a manner that the recesses 36 a are arranged,with an even distribution over the contact face 34 a of the backingelement 22 a, around the axis of motion 26 a, in particular theconnection region 14 a. The faces 38 a of the backing element 22 a thatdelimit the recesses 36 a, as viewed in the plane of main extent of thebacking element 22 a, are of an identical basic shape. Preferably, thefaces delimiting the recesses 36 a are arranged perpendicularly to thecontact face 34 a. The recesses 36 a delimited by the backing element 22a are designed at least to increase a diffusion of heat generated duringan abrasion process, in particular in a processing region 40 a of theabrasive 20 a, from the contact face 34 a to a side of the backing unit16 a, in particular of the backing element 22 a, that faces away fromthe fastening unit 18 a, preferably as compared with a design of thebacking element 22 a in which the backing element 22 a is realizedwithout recesses. The connection region 14 a delimits, via an outer side33 a, six recesses 35 a which, when the connection region 14 a isfastened to the backing unit 16 a, in particular as viewedperpendicularly to the plane of main extent of the backing element 22 a,are arranged congruently with the recesses 36 a of the backing element22 a. Preferably, the outer side 33 a of the connection region 14 a, inregions of the recesses 35 a, 36 a delimiting by the backing element 22a and the connection region 14 a, is at least partially parallel, inparticular flush, with the faces 32 a of the backing element 22 a thatdelimit the recesses 36 a delimited by the backing element 22 a. Inparticular, the backing element 22 a delimits at least one furtherrecess 37 a, which extends around the axis of motion 26 a. The furtherrecess 37 a, as viewed in a plane of main extent of the backing element22 a, is arranged in a region of the backing element 22 a in which theconnection region 14 a is arranged on the backing element 22 a. However,other designs of the backing unit 16 a, in particular of the backingelement 22 a, are also conceivable.

The abrasion tool device 12 a has a heat transfer coating 42 a, which isarranged between the backing unit 16 a, in particular the backingelement 22 a, and the fastening unit 18 a, preferably on the contactface 34 a. It is also conceivable, however, for the heat transfercoating 42 a to be arranged on the fastening unit 18 a on a side of thefastening unit 18 a, in particular of the fastening element 28 a of thefastening unit 18 a, that faces away from the backing unit 16 a, inparticular the backing element 22 a. The heat transfer coating 42 abears at least substantially with full surface contact against thefastening element 28 a of the fastening unit 18 a. The heat transfercoating 42 a has a greater thermal conduction characteristic than thebacking unit 16 a, in particular the backing element 22 a, and/or thefastening unit 18 a, in particular the fastening element 28 a of thefastening unit 18 a. The heat transfer coating 42 a is made of copper.However, other designs of the heat transfer coating 42 a are alsoconceivable, the heat transfer coating 42 a being made, for example,from a noble metal and/or an alkaline earth metal, a carbon compound, inparticular graphene, diamond, and/or a graphite close to graphene or thelike. The heat transfer coating 42 a is in particular vapor-depositedonto the fastening element 28 a of the fastening unit 18 a.

The fastening element 28 a of the fastening unit 18 a bears at leastsubstantially with full surface contact against the backing element 22a, in particular the contact face 34 a, via the adhesive element 30 a.The fastening unit 18 a, in particular the fastening element 28 a of thefastening unit 18 a, delimits six cut-outs 44 a that are designed todissipate heat from the abrasive 20 a and/or the backing unit 16 a to anenvironment surrounding the fastening unit 18 a, in particular thefastening element 28 a of the fastening unit 18 a. The fastening unit 18a, in particular the fastening element 28 a of the fastening unit 18 a,is realized in such a manner that the cut-outs 44 a extend from a sideon which the fastening element 28 a of the fastening unit 18 a isarranged on the contact face 34 a, over a maximum thickness 46 a of thefastening unit 18 a, in particular of the fastening element 28 a of thefastening unit 18 a, to a side of the fastening unit 18 a, in particularof the fastening element 28 a of the fastening unit 18 a, that facestoward the abrasive 20 a. The fastening element 28 a is realized in sucha manner that the cut-outs 44 a are arranged uniformly around the axisof motion 26 a, as viewed in the plane of main extent of the fasteningelement 28 a of the fastening unit 18 a. In particular, the fasteningelement 28 a of the fastening unit 18 a delimits, around the axis ofmotion 26 a, a recess 48 a arranged so as to correspond to the furtherrecess 37 a of the backing element 22 a around the axis of motion 26 a.However, other designs of the fastening unit 18 a, in particular of thefastening element 28 a of the fastening unit 18 a, are also conceivable,for example as an adhesive bonded joint, in particular a re-releasableadhesive bonded joint, as a hook, as a clip, as a vacuum element or thelike.

FIG. 3 shows the abrasion tool system 10 a in a sectional plane alignedparallel to the axis of motion 26 a. In particular, for greater claritythe layer thicknesses of the individual elements shown in FIG. 3represented schematically, and are not to scale. Preferably, FIG. 3shows a sectional plane at a distance from the outer edge 82 a and/orfrom the outer side 88 a, in particular the protective unit 80 a notbeing shown in FIG. 3. The backing unit 16 a, in particular the backingelement 22 a, has a maximum thickness 50 a of at least substantially 2mm perpendicularly to the contact face 34 a of the backing unit 16 awith the fastening unit 18 a. It is also conceivable, however, for thebacking unit 16 a, in particular the backing element 22 a, to have amaximum thickness 50 a of less than 2 mm, particularly preferably of atleast substantially 1 mm, 0.8 mm or 0.6 mm. The backing element 22 a hasa flatness on the contact face 34 a of maximally 2% of the maximumthickness. The backing element 22 a is realized in such a manner thatthe maximum thickness 50 a extends from the contact face 34 a to abearing contact surface of the backing element 22 a at which theconnection region 14 a bears against the backing element 22 a, inparticular the connection region 14 a not being shown in FIG. 3. Thefastening unit 18 a, in particular the fastening element 28 a of thefastening unit 18 a, has a maximum thickness 46 a of 2 mmperpendicularly to a face of the fastening element 28 a of the fasteningunit 18 a that faces toward the contact face 34 a of the backing element22 a. The adhesive element 30 a has a maximum thickness 52 a of 1 mmperpendicularly to a face of the adhesive element 30 a that faces towardthe contact face 34 a of the backing element 22 a.

The abrasive 20 a comprises a working face 54 a, which has amultiplicity of abrasive elements, and a connection face 53 a forconnection to the fastening unit 18 a of the abrasion tool device 12 a.The connection face 53 a comprises a fastening element 78 a, realized aspart of a hook-and-loop fastening, that is made from a material having amelting temperature of more than 160° C., in particular more than 180°C., preferably more than 200° C., particularly preferably more than 220°C., very preferably more than 240° C., and particularly advantageouslypreferably more than 250° C. Preferably, the fastening element 78 a ofthe abrasive 20 a is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that in particular is less than 350° C., preferably lessthan 300° C., particularly preferably less than 280° C., and veryparticularly preferably less than 260° C. Preferably, the fasteningelement 78 a of the abrasive 20 a is at least mainly, in particular atleast substantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 160° C., inparticular less than 300° C. and greater than 180° C., preferably lessthan 280° C. and greater than 200° C., particularly preferably less than280° C. and greater than 220° C., and very particularly preferably lessthan 280° C. and greater than 240° C. The fastening element 78 a of theabrasive 20 a is realized so as to correspond to the fastening element28 a of the fastening unit 18 a. The fastening element 78 a of theabrasive 20 a is made of a fiber-reinforced thermoplastic. Theconnection face 53 a, in particular the fastening element 78 a of theabrasive 20 a, bears at least substantially with full surface contactagainst the working face 54 a, on a side of the working face 54 a thatfaces away from the abrasive elements. The connection face 53 a, inparticular the fastening element 78 a of the abrasive 20 a, extends overan entire side of the working face 54 a. The working face 54 a and theconnection face 53 a each have a basic shape, as viewed in a plane ofmain extent of the abrasive 20 a, at least one outer contour of thebasic shape of the working face 54 a and of the connection face 53 acorresponding to an outer contour of the basic shape of the backingelement 22 a. The working face 54 a has a maximum thickness 56 a of 2 mmparallel to the axis of motion 26 a. The connection face 53 a, inparticular the fastening element 78 a of the abrasive 20 a, has amaximum thickness 58 a of 2 mm parallel to the axis of motion 26 a. Theabrasive 20 a comprises a heat transfer coating 60 a, which is arrangedbetween the working face 54 a and the fastening element 78 a of theabrasive 20 a. Preferably, the heat transfer coating 60 a of theabrasive 20 a is designed to remove heat generated at the working face54 a during an abrasion process. The heat transfer coating 60 a of theabrasion tool device 12 a and the heat transfer coating 42 a of theabrasive 20 a are each realized as a flat, thin layer and have a maximumthickness 62 a of 0.3 mm parallel to the axis of motion 26 a. The heattransfer coating 60 a of the abrasive 20 a bears at least substantiallywith full surface contact against the working face 54 a and against thefastening element 78 a of the abrasive 20 a. The heat transfer coating60 a of the abrasive 20 a has in particular a higher thermal conductioncharacteristic than the working face 54 a and the fastening element 78 aof the abrasive 20 a. However, other designs of the abrasive 20 a, inparticular of the fastening element 78 a of the abrasive 20 a, are alsoconceivable.

FIGS. 4 to 9 show five further exemplary embodiments of the invention.The following descriptions and the drawings are limited substantially tothe differences between the exemplary embodiments and, in principle,reference may also be made to the drawings and/or the description of theother exemplary embodiments, in particular of FIGS. 1 to 3, in respectof components having the same designation, in particular in respect ofcomponents denoted by the same references. To distinguish the exemplaryembodiments, the letter a has been appended to the references of theexemplary embodiment in FIGS. 1 to 3. In the exemplary embodiments ofFIGS. 4 to 9, the letter a is replaced by the letters b to f.

FIG. 4 shows a backing element 22 b of a backing unit 16 b of analternative design of an abrasion tool device 12 b. The abrasion tooldevice 12 b comprises the backing unit 16 b and a fastening unit 18 bfor detachably fastening an abrasive 20 b of an abrasion tool system 10b to the backing unit 16 b, the backing unit 16 b comprising the backingelement 22 b on which the abrasive 20 b is arranged via the fasteningunit 18 b. The backing element 22 b is made from a material having amelting temperature of more than 180° C., preferably more than 200° C.,particularly preferably more than 220° C., very particularly preferablymore than 240° C., and particularly advantageously preferably more than250° C. Preferably, the backing element 22 b is at least mainly, inparticular at least substantially entirely, made from the materialhaving a melting temperature that in particular is less than 350° C.,preferably less than 300° C., particularly preferably less than 280° C.,and very particularly preferably less than 260° C. Preferably, thebacking element 22 b is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 180° C., inparticular less than 300° C. and greater than 200° C., preferably lessthan 280° C. and greater than 220° C., particularly preferably less than280° C. and greater than 240° C., and very particularly preferably lessthan 280° C. and greater than 250° C. The abrasion tool device 12 brepresented in FIG. 4 is of a design that is at least substantiallysimilar to the abrasion tool device 12 a described in the description ofFIGS. 1 to 3, such that reference may be made, at least substantially,to the description of FIGS. 1 to 3 with respect to a design of theabrasion tool device 12 b represented in FIG. 4. In contrast to theabrasion tool device 12 a described in the description of FIGS. 1 to 3,the backing element 22 b of the abrasion tool device 12 b represented inFIG. 4 is realized as a strut structure 64 b. The strut structure 64 bis realized in the manner of a skeleton. The strut structure 64 b iscomposed of a multiplicity of identical elementary cells 66 b, witch areeach composed of twelve struts 68 b. The elementary cells 66 b of thestrut structure 64 b are cubic. The elementary cells 66 b of the strutstructure 64 b, as viewed in a plane of main extent of the backing unit16 b, have a rectangular basic shape. The strut structure 64 b isrealized as a cubic grid, with struts 68 b arranged along the gridlines. The backing element 22 b is composed of a layer 72 b ofelementary cells 66 b of the strut structure 64 b that extend parallelto the plane of main extent of the backing element 22 b andperpendicularly to an axis of motion 26 b of the abrasion tool device 12b. The backing unit 16 b comprises a support element 69 b, the supportelement 69 b at least mainly enclosing the backing element 22 b, and thesupport element 69 b having a thermal conduction characteristic that isgreater than a thermal conduction characteristic of the backing element22 b. The support element 69 b is designed to dissipate heat generatedat the abrasive 20 b. In particular, the support element 69 b isdesigned to protect the backing element 22 b against impacts and/orplastic deformations, in particular of the individual struts 68 b. Thebacking element 22 b is realized as an endoskeleton and is arranged, atleast mainly, within the support element 69 b. The support element 69 bis made from a material having a melting temperature of more than 160°C., in particular more than 180° C., preferably more than 200° C.,particularly preferably more than 220° C., very particularly preferablymore than 240° C., and particularly advantageously preferably more than250° C. Preferably, the support element 69 b is at least mainly, inparticular at least substantially entirely, made from the materialhaving a melting temperature that in particular is less than 350° C.,preferably less than 300° C., particularly preferably less than 280° C.,and very particularly preferably less than 260° C. Preferably, thebacking element 69 b is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 160° C., inparticular less than 300° C. and greater than 180° C., preferably lessthan 280° C. and greater than 200° C., particularly preferably less than280° C. and greater than 220° C., and very particularly preferably lessthan 280° C. and greater than 240° C. The support element 69 b is atleast mainly made from a foam material. The backing element 22 b has agreater stiffness than the support element 69 b. However, other designsof the strut structure 64 b and/or the support element 69 b are alsoconceivable.

FIG. 5 shows a top view of a backing element 22 c of a backing unit 16 cof a further alternative design of an abrasion tool device 12 c. Theabrasion tool device 12 c comprises the backing unit 16 c and afastening unit 18 c for detachably fastening an abrasive 20 c of anabrasion tool system 10 c to the backing unit 16 c, the backing unit 16c comprising the backing element 22 c on which the abrasive 20 c isarranged via the fastening unit 18 c. The backing element 22 c is madefrom a material having a melting temperature of more than 180° C.,preferably more than 200° C., particularly preferably more than 220° C.,very particularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. Preferably, the backingelement 22 c is at least mainly, in particular at least substantiallyentirely, made from the material having a melting temperature that inparticular is less than 350° C., preferably less than 300° C.,particularly preferably less than 280° C., and very particularlypreferably less than 260° C. Preferably, the backing element 22 c is atleast mainly, in particular at least substantially entirely, made fromthe material having a melting temperature that is less than 350° C. andgreater than 180° C., in particular less than 300° C. and greater than200° C., preferably less than 280° C. and greater than 220° C.,particularly preferably less than 280° C. and greater than 240° C., andvery particularly preferably less than 280° C. and greater than 250° C.The abrasion tool device 12 c represented in FIG. 5 is of a design thatis at least substantially similar to the abrasion tool device 12 bdescribed in the description of FIG. 4, such that reference may be made,at least substantially, to the description of FIG. 4 with respect to adesign of the abrasion tool device 12 c represented in FIG. 5. Incontrast to the abrasion tool device 12 b described in the descriptionof FIG. 4, the backing element 22 c of the abrasion tool device 12 crepresented in FIG. 5 is realized as a strut structure 64 c, the strutstructure 64 c being composed of a multiplicity of elementary meshes 70c. The elementary meshes 70 c of the strut structure 64 c are realizedin the manner of a honeycomb, and are each composed of six struts 68 c.The strut structure 64 c, as viewed along an axis of the backing element22 c aligned perpendicularly to a contact face 34 c of the backingelement 22 c and/or along an axis of motion 26 c of the abrasion tooldevice 12 c, has a honeycomb structure, in particular the elementarymeshes 70 c of the strut structure 64 c each having the shape of anequilateral hexagon in at least one sectional plane aligned parallel tothe contact face 34 c. The backing element 22 c is composed of more thanone layer 72 c of elementary meshes 70 c of the strut structure 64 c,only one layer 72 c being shown in FIG. 5. The layers 72 c of theelementary meshes 70 c are connected via struts 68 c, and are at leastpartially offset from one another along an axis of the backing element22 c that is perpendicular to the contact face 34 c. The layers of theelementary meshes 70 c extend perpendicularly to the axis of motion 26 cand/or parallel to the contact face 34 c. The layers of the elementarymeshes 70 c are arranged along the axis of the backing element 22 c thatis aligned perpendicularly to the contact face 34 c, in particular theaxis of motion 26 c, alternately from layer to layer in an offset manneralong at least one axis aligned parallel to the contact face 34 c. Inparticular, the strut structure 64 c is realized as a graphitestructure.

FIG. 6 shows a top view of an alternative design of an abrasion toolsystem 10 d. The abrasion tool system 10 d represented in FIG. 6 is of adesign that is at least substantially similar to the abrasion toolsystem 10 a described in the description of FIGS. 1 to 3, such thatreference may be made, at least substantially, to the description ofFIGS. 1 to 3 with respect to a design of the abrasion tool system 10 drepresented in FIG. 6. In contrast to the abrasion tool system 10 adescribed in the description of FIGS. 1 to 3, the abrasion tool system10 d represented in FIG. 6 has an abrasive 20 d that is arranged only onone side of an axis of motion 26 d of an abrasion tool device 12 d. Theabrasion tool system 10 d is designed for use with an abrasion powertool realized as a multifunction power tool that can be driven in anoscillating manner. The abrasion tool device 12 d comprises a backingunit 16 d and a fastening unit 18 d for detachably fastening an abrasive20 d to the backing unit 16 d, the backing unit 16 d comprising abacking element 22 d on which the abrasive 20 d is arranged via thefastening unit 18 d. The backing element 22 d is made from a materialhaving a melting temperature of more than 180° C., preferably more than200° C., particularly preferably more than 220° C., very particularlypreferably more than 240° C., and particularly advantageously preferablymore than 250° C. Preferably, the backing element 22 d at least mainly,in particular at least substantially entirely, is made from the materialhaving a melting temperature that in particular is less than 350° C.,preferably less than 300° C., particularly preferably less than 280° C.,and very particularly preferably less than 260° C. Preferably, thebacking element 22 d is at least mainly, in particular at leastsubstantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 180° C., inparticular less than 300° C. and greater than 200° C., preferably lessthan 280° C. and greater than 220° C., particularly preferably less than280° C. and greater than 240° C., any very particularly preferably lessthan 280° C. and greater than 250° C. It is conceivable for the abrasiontool device 12 d, in a manner similar to the abrasion tool device 12 adescribed in FIGS. 1 to 3, to comprise a protective unit 80 d, which isnot shown in FIG. 6. The abrasion tool device 12 d comprises aconnection region 14 d arranged around the axis of motion 26 d. Thebacking element 22 d is arranged around the axis of motion 26 d and, ina direction away from the axis of motion 26 d, has a backing region 74 don which the abrasive 20 d can be fastened to the backing element 22 dvia the fastening unit 18 d. The backing region 74 d has, at leastpartially, a triangular basic shape, in particular with corners of thebasic shape being rounded. Also conceivable, however, are designs of thebacking element 22 d in which the basic shape is, for example,star-shaped, square-shaped and/or circular. The fastening unit 18 d hasa fastening element 28 d, realized as a re-releasable adhesive bondedjoint, for fastening the abrasive 20 d, arranged in the backing region74 d on the backing element 22 d, to the backing unit 16 d. Thefastening element 28 d of the fastening unit 18 d is made from amaterial having a melting temperature of more than 160° C., inparticular more than 180° C., preferably more than 200° C., particularlypreferably more than 220° C., very particularly preferably more than240° C., and particularly advantageously preferably more than 250° C.Preferably, the fastening element 28 d is at least mainly, in particularat least substantially entirely, made from the material having a meltingtemperature that in particular is less than 350° C., preferably lessthan 300° C., particularly preferably less than 280° C., and veryparticularly preferably less than 260° C. Preferably, the fasteningelement 28 d is at least mainly, in particular at least substantiallyentirely, made from the material having a melting temperature that isless than 350° C. and greater than 160° C., in particular less than 300°C. and greater than 180° C., preferably less than 280° C. and greaterthan 200° C., particularly preferably less than 280° C. and greater than220° C., and very particularly preferably less than 280° C. and greaterthan 240° C. The backing element 22 d has a maximum thickness 50 d of 2mm perpendicularly to a contact face 34 d of the backing unit 16 d withthe fastening unit 18 d. The contact face 34 d extends over an entireface of the backing element 22 d that faces toward the connection region14 d, within the backing region 74 d. In particular, the contact face 34d is arranged perpendicularly to the axis of motion 26 d on the backingelement 22 d. The abrasion tool device 12 d comprises a heat transfercoating 42 d arranged, on a side of the fastening unit 18 d that facesaway from the backing unit 16 d, in particular the backing element 22 d,on the fastening element 28 d of the fastening unit 18 d. The fasteningunit 18 d has an adhesive element 30 d realized a bonding agent, whichis designed to fasten the fastening element 28 d of the fastening unit18 d, in particular non-detachably, to the backing element 22 d. It isalso conceivable, however, for the holding element 30 d to be realizedin such a manner that the fastening element 28 d is replaceably fastenedto the backing element 22 d via the holding element 30 d. The fasteningelement 28 d of the fastening unit 18 d bears with full-surface contactagainst the backing element 22 d via the adhesive element 30 d, inparticular within the backing region 74 d. The abrasive 20 d comprises aworking face 54 d, which has a multiplicity of abrasive elements, and aninterface 76 d for arrangement of the abrasive 20 d on the fasteningunit 18 d of the abrasion tool device 12 d. The interface 76 d has afastening element 78 d that is made from a material having a meltingtemperature of more than 160° C., in particular more than 180° C.,preferably more than 200° C., particularly preferably more than 220° C.,very particularly preferably more than 240° C., and particularlyadvantageously preferably more than 250° C. Preferably, the fasteningelement 78 d of the abrasive 76 d is at least mainly, in particular atleast substantially entirely, made from the material having a meltingtemperature that in particular is less than 350° C., preferably lessthan 300° C., particularly preferably less than 280° C., and veryparticularly preferably less than 260° C. Preferably, the fasteningelement 78 d of the abrasive 76 d is at least mainly, in particular atleast substantially entirely, made from the material having a meltingtemperature that is less than 350° C. and greater than 160° C., inparticular less than 300° C. and greater than 180° C., preferably lessthan 280° C. and greater than 200° C., particularly preferably less than280° C. and greater than 220° C., and very particularly preferably lessthan 280° C. and greater than 240° C. The fastening element 78 d of theabrasive 20 d is realized as an adhesive surface, and is designed to actin combination with the fastening element 28 d of the fastening unit 18d.

FIGS. 7 and 8 show a further alternative design of an abrasion tooldevice 12 e. In particular, the abrasion tool device 12 e is realized aspart of an abrasion tool system 10 e. FIG. 7 shows a sectional view of abacking element 22 e of a backing unit 16 e of the abrasion tool device12 e, and of a protective element 84 e of a protective unit 80 e of theabrasion tool device 12 e, in particular a sectional plane comprising acommon central axis 96 e of the backing element 22 e and of theprotective element 84 e. In FIG. 7, the backing element 22 e and theprotective element 84 e are shown arranged on each other. The abrasiontool device 12 e comprises the backing unit 16 e and a fastening unit 18e (not shown in FIG. 7) for detachably fastening an abrasive, inparticular an abrasive paper or an abrasive fleece, to the backing unit16 e. The backing unit 16 e comprises the backing element 22 e, on whichthe abrasive can be arranged via the fastening unit 18 e. The backingelement 22 e is made from a material having a melting temperature ofmore than 180° C., preferably more than 200° C., particularly preferablymore than 220° C., very particularly preferably more than 240° C., andparticularly advantageously preferably more than 250° C. The abrasiontool device 12 e comprises the protective unit 80 e, which is arrangedon the backing element 22 e and is designed, in particular during anabrasion operation, to protect a workpiece, the backing element 22 e oran external unit, in particular from damage, and/or to damp an impact,in particular direct impact, of the backing element 22 e on theworkpiece or on the external unit. The abrasion tool device 12 erepresented in FIGS. 7 and 8 is of a design that is at leastsubstantially similar to the abrasion tool device 12 a described in thedescription of FIGS. 1 to 3, such that reference may be made, at leastsubstantially, to the description of FIGS. 1 to 3 with respect to adesign of the abrasion tool device 12 e represented in FIGS. 7 and 8. Incontrast to the abrasion tool device 12 a described in the descriptionof FIGS. 1 to 3, the protective element 84 e of the protective unit 80 eof the abrasion tool device 12 e represented in FIGS. 7 and 8 has amelting temperature of more than 220° C., preferably more than 240° C.,and more preferably more than 260° C. In particular, the protective unit80 e is composed of the protective element 84 e. It is also conceivable,however, for the protective unit 80 e to comprise more than oneprotective element 84 e, each arranged on the backing element 22 e. Theprotective element 84 e, as viewed along a central axis 96 e of thebacking element 22 e and/or of the protective element 84 e, has an outeredge 98 e, which has a greater minimum distance 100 e from an axis ofmotion 26 e and/or from the central axis 96 e of the backing element 22e and/or of the protective element 84 e than has an outer edge 102 e ofthe backing element 22 e. The central axis 96 e of the backing element22 e and/or of the protective element 84 e, as viewed in a plane of mainextent 103 e of the backing element 22 e, comprises a geometricmid-point of a shape of the backing element 22 e and/or of theprotective element 84 e. Preferably, the central axis 96 e of thebacking element 22 e and/or of the protective element 84 e is arrangedat least substantially perpendicularly to the plane of main extent 103 eof the backing element 22 e. Preferably, the outer edge 102 e of thebacking element 22 e, as viewed in the plane of main extent 103 e of thebacking element 22 e, is part of an outer contour of the backing element22 e.

The protective element 84 e is arranged on an outer side of the backingelement 22 e that faces away from the abrasive and/or a contact face 34e of the backing element 22 e. The protective element 84 e bears againstthe outer edge 102 e of the backing element 22 e. Preferably, theprotective element 84 e is arranged at a distance from the contact face34 e of the backing element 22 e and/or from the abrasive. The backingelement 22 e has an outer face 114 e that, on a side of the outer face114 e of the backing element 22 e that faces away from the contact face34 e of the backing element 22 e, is at least partially covered by theprotective element 84 e. The outer face 114 e of the backing element 22e is aligned at least substantially perpendicularly to the plane of mainextent 103 e of the backing element 22 e, and is arranged around theaxis of motion 26 e and/or the central axis 96 e of the backing element22 e and/or of the protective element 84 e. In particular, the outerface 114 e of the backing element 22 e realizes the outer edge 102 e ofthe backing element 22 e. The outer edge 102 e of the backing element 22e is arranged within the plane of main extent 103 e of the backingelement 22 e, and extends at least substantially entirely around theaxis of motion 26 e and/or the central axis 96 e of the backing element22 e and/or of the protective element 84 e. The outer face 114 e of thebacking element 22 e delimits the contact face 34 e of the backingelement 22 e via a side edge of the outer face 114 e of the backingelement 22 e. The protective element 84 e is arranged on the backingelement 22 e, along the outer edge 102 e and/or the outer face 114 e ofthe backing element 22 e, at least substantially entirely around theaxis of motion 26 e and/or the central axis 96 e. The protective element84 e encompasses the outer edge 102 e of the backing element 22 e atleast substantially perpendicularly to the central axis 96 e of thebacking element 22 e. The protective element 84 e extends at leastmainly over a maximum thickness 50 e of the backing element 22 e, inparticular at the outer edge 102 e of the backing element 22 e.Preferably, the protective element 84 e, in particular as viewedperpendicularly to the plane of main extent 103 e of the backing element22 e, has a maximum thickness 86 e of in particular at least 0.3 mm,preferably at least 0.5 mm, more preferably at least 0.8 mm, andparticularly preferably at least 1 mm. Preferably, a minimum thickness86 e of the protective element 84 e is at most 1 cm, preferably at most0.5 mm and preferably at most 3 mm. Preferably, the maximum thickness 86e of the protective element 84 e is less than the maximum thickness 50 eof the backing element 22 e. Preferably, the protective unit 80 e, inparticular the protective element 84 e, is at least mainly, inparticular at least substantially entirely, made from the materialhaving a melting temperature that in particular is less than 350° C.,preferably less than 300° C., particularly preferably less than 280° C.,and very particularly preferably less than 260° C. The protective unit80 e, in particular the protective element 84 e, is made from aglass-fiber-reinforced plastic. However, other designs of the protectiveunit 80 e, in particular of the protective element 84 e, are alsoconceivable, for example made from a thermoplastic or a polyamide,and/or from a rubber, from a partially aromatic polyamide, in particularof the type Grivory GV-5H, or from polyphenylene sulfide Preferably, theprotective element 84 e is made from a material that has a lesserstiffness than the backing element 22 e, in particular the material fromwhich the backing element 22 e is made. It is conceivable for theprotective unit 80 e, in particular the protective element 84 e, to berealized so as to be replaceable, in particular the protective unit 80e, in particular the protective element 84 e, being separable from thebacking element 22 e without leaving any residue and/ornon-destructively. Alternatively, it is conceivable for the protectiveunit 80 e to comprise more than one protective element 84 e, arranged onthe backing element 22 e, along the outer edge 102 e and/or the outerface 114 e of the backing element 22 e. In particular in a design inwhich the protective unit 80 e has more than one protective element 84e, it is conceivable for the protective elements 84 e of the protectiveunit 80 e to only partially cover the outer edge 102 e and/or the outerface 114 e of the backing element 22 e, for example in a region ofcorners of a basic shape of the backing element 22 e.

The protective element 84 e has two outer faces 112 e, 113 e, which, inparticular in at least one state in which the protective element 84 e isarranged on the backing element 22 e, as viewed in a sectional planecomprising the central axis 96 e of the backing element 22 e and/or ofthe protective element 84 e, are at least substantially inclinedrelative to the central axis 96 e of the backing element 22 e and/or ofthe protective element 84 e. The outer edge 98 e of the protectiveelement 84 e delimits the outer faces 112 e, 113 e of the protectiveelement 84 e at least partially, in particular at least substantiallyentirely, as viewed around the central axis 96 e of the backing element22 e and/or of the protective element 84 e. Preferably, a plane of mainextent of the protective element 84 e, in at least one state in whichthe protective element 84 e is arranged on the backing element 22 e, isarranged at least substantially parallel to the plane of main extent 103e of the backing element 22 e. The outer faces 112 e, 113 e of theprotective element 84 e have, at least substantially perpendicularly tothe central axis 96 e of the backing element 22 e and/or of theprotective element 84 e, in each case a greater maximum distance 104 efrom the central axis 96 e of the backing element 22 e and/or of theprotective element 84 e than has the outer edge 102 e of the backingelement 22 e. The protective element 84 e has a connection direction 116e, the protective element 84 e being designed to be arranged on, inparticular fastened to, the backing element 22 e by a movement in theconnection direction 116 e. The connection direction 116 e is arrangedat least substantially parallel to the central axis 96 e of the backingelement 22 e and/or of the protective element 84 e. The connectiondirection 116 e is at least substantially perpendicular to the plane ofmain extent of the protective element 84 e. The two outer faces 112 e,113 e of the protective element 84 e each have an angle 118 e, 120 e,relative to the central axis 96 e of the backing element 22 e and/or ofthe protective element 84 e, from an angular range in particular of from8° to 92°, preferably from 15° to 85°, and more preferably from 20° to80°. One outer face 112 e of the two outer faces 112 e, 113 e of theprotective element 84 e has an angle 118 e, relative to the central axis96 e of the backing element 22 e and/or of the protective element 84 e,that is spanned in the connection direction 116 e by a, in particularvirtual, point of intersection 122 e of a straight line, that extends atleast substantially parallel to the central axis 96 e and through theouter edge 98 e of the protective element 84 e, and by the outer face112 e of the protective element 84 e. A further outer face 113 e of thetwo outer faces 112 e, 113 e of the protective element 84 e has an angle120 e, relative to the central axis 96 e of the backing element 22 eand/or of the protective element 84 e, that is spanned contrary to theconnection direction 116 e by a, in particular virtual, point ofintersection 124 e of the straight line, that extends at leastsubstantially parallel to the central axis 96 e and through the outeredge 98 e of the protective element 84 e, and by the further outer face113 e of the protective element 84 e. Preferably, the further outer face113 e of the protective element 84 e realizes a chamfer on an outer edgeof the protective element 84 e that faces away from the contact face 34e. In particular, the outer face 112 e of the protective element 84 erealizes a chamfer on an outer edge of the protective element 84 e thatfaces toward the contact face 34 e. The further outer face 113 e of theprotective element 84 e is arranged on a side of the protective element84 e that faces away from the backing element 22 e, in particular thecontact face 34 e. The outer face 112 e of the protective element 84 e,as viewed at least substantially perpendicularly to the central axis 96e of the backing element 22 e and/or of the protective element 84 e,realizes a contour 126 e of the protective element 84 e, in particulardelimiting the protective element 84 e in the connection direction 116e. Preferably, the outer face 112 e and the further outer face 113 e ofthe protective element 84 e are arranged at a distance from each otheron the protective element 84 e. It is also conceivable, however, for theouter face 112 e and the further outer face 113 e of the protectiveelement 84 e to at least partially delimit each other, in particular onone side in each case. Preferably, the two outer faces 112 e, 113 e, inparticular the outer face 112 e and the further outer face 113 e, of theprotective element 84 e are realized with a flat surface. It is alsoconceivable, however, for the outer face 112 e and/or the further outerface 113 e of the protective element 84 e to be curved.

The protective element 84 e extends, at least substantiallyperpendicularly to the central axis 96 e of the backing element 22 eand/or of the protective element 84 e, at least substantially entirelyover a maximum extent 106 e of the backing element 22 e (see also FIG.8). The protective element 84 e surrounds the backing element 22 e atleast substantially entirely, in particular when the protective unit 80e is in as assembled state, as viewed along the central axis 96 e of thebacking element 22 e and/or of the protective element 84 e. Theprotective element 84 e, in particular when the protective unit 80 e isin an assembled state and/or is arranged on the backing element 22 e,extends at least mainly, in particular at least substantially entirely,along an, in particular upper, outer edge 102 e of the backing element22 e, the protective element 84 e in particular bearing against theouter edge 102 e and the outer face 114 of the backing element 22 e. Inparticular in the alternative design in which the protective unit 80 ecomprises more than one protective element 84 e, the protective elements84 e each bear against the outer edge 102 e of the backing element 22 eand are in particular arranged at a distance from each another. It isalso conceivable, however, for the protective elements 84 e to bearranged against and/or connected to each other for arrangement onand/or fastening to the backing element 22 e.

FIG. 8 shows a perspective view of the backing element 22 e and of theprotective element 84 e, the protective element 84 e being in particulararranged on the backing element 22 e. The backing element 22 e realizesthree holding means 108 e, which are designed for holding the protectiveelement 84 e of the protective unit 80 e on the backing element 22 e ina force-fitting and/or form-fitting manner. However, designs of thebacking element 22 e with a number of holding means 108 e other thanthree are also conceivable. The backing element 22 e and the holdingmeans 108 e are realized as a single part. The holding means 108 e arerealized as recesses. In particular, the protective element 84 e isrealized so as to correspond to the backing element 22 e and the holdingmeans 108 e, and is designed to be connected to the backing element 22 ein a force-fitting and/or form-fitting manner, in particular via theholding means 108 e.

The protective element 84 e realizes three counter-holding means 128 e,which are designed to act in combination with the holding means 108 efor the purpose of connecting the protective element 84 e and thebacking element 22 e in a force-fitting and/or form-fitting manner, inparticular when the protective element 84 e is arranged on the backingelement 22 e. Particularly preferably, the protective element 84 e andthe counter-holding means 128 e are realized as a single part. Thecounter-holding means 128 e are each realized and arranged so as tocorrespond to one of the holding means 108 e. The counter-holding means128 e are realized as extensions, which are intended in particular toengage in the holding means 108 e when the protective element 84 e isarranged on the backing element 22 e. However, other designs of thebacking element 22 e, in particular of the holding means 108 e, and/orof the protective element 84 e, in particular of the counter-holdingmeans 128 e, are also conceivable. For example, it is conceivable forthe counter-holding means 128 e to be realized as recesses that aredesigned to act in combination with holding means 108 e realized as pinsor other types of extensions. The holding means 108 e, in particular asviewed from the central axis 96 e of the backing element 22 e, are eacharranged in an outer peripheral region of the backing element 22 e,which in particular adjoins the outer edge 102 e of the backing element22 e. The counter-holding means 128 e, in particular as viewed from thecentral axis 96 e of the protective element 84 e, are each arranged inan outer peripheral region of the protective element 84 e. The holdingmeans 108 e are arranged on a side of the backing element 22 e thatfaces away from the contact face 34 e, in particular the contact face 34e in FIG. 8 being arranged on a side of the backing element 22 e thatfaces away from the image plane. The holding means 108 e realized asrecesses extend, from the side of the backing element 22 e that facesaway from the contact face 34 e, in the connection direction 116 eand/or toward the contact face 34 e, the contact face 34 e being inparticular realized at a distance from the holding means 108 e. It isalso conceivable, however, for the holding means 108 e, realized asrecesses, to extend over the entire thickness 50 e of the backingelement 22 e. The counter-holding means 128 e are arranged on a side ofthe protective element 84 e that is arranged in the connection direction116 e. The holding means 108 e are arranged with an evenly distributionaround the central axis 96 e of the backing element 22 e. Thecounter-holding means 128 e are arranged with an even distributionaround the central axis 96 e of the protective element 84 e.

FIG. 9 shows a detail of another, further design of an abrasion tooldevice 12 f as part of an abrasion tool system 10 f, in cross-section.The abrasion tool device 12 f comprises a backing unit 16 f and afastening unit 18 f for detachably fastening an abrasive 20 f of theabrasion tool system 10 f, in particular realized as an abrasive paperor abrasive fleece, to the backing unit 16 f. The backing unit 16 fcomprises a backing element 22 f, as a support plate, on which theabrasive 20 f can be arranged via the fastening unit 18 f. The backingelement 22 f is made from a material having a melting temperature ofmore than 180° C., preferably more than 200° C., particularly preferablymore than 220° C., very particularly preferably more than 240° C., andparticularly advantageously preferably more than 250° C. The abrasiontool device 12 f represented in FIG. 9 is of a design that is at leastsubstantially similar to the abrasion tool device 12 a described in thedescription of FIGS. 1 to 3, such that reference may be made, at leastsubstantially, to the description of FIGS. 1 to 3 with respect to adesign of the abrasion tool device 12 a represented in FIG. 9. Incontrast to the abrasion tool device 12 a described in the descriptionof FIGS. 1 to 3, the fastening unit 18 f of the abrasion tool device 12f represented in FIG. 9 comprises an intermediate element 110 f, whichis designed to be arranged between the backing element 22 f and theabrasive 20 f so as to be removable and/or replaceable, in particular atleast substantially non-destructively, at least substantially withoutuse of tools, the intermediate element 110 f being made from a materialhaving a melting temperature of more than 180° C., preferably more than200° C., particularly preferably more than 220° C., very particularlypreferably more than 240° C., and particularly advantageously preferablymore than 250° C. The fastening unit 18 f comprises bonding agent 130 fand two fastening element 132 that are realized as hook-and-loopfastenings, the two fastening elements 132 f each being fastened to theintermediate element 110 in a materially bonded manner via the bondingagent 130 f. The intermediate element 110 f can be fastened to thebacking element 22 f and/or the abrasive 20 f via the two fasteningelements 132 f. The abrasion tool device 12 f has a heat transfercoating 42 f arranged on an underside of the intermediate element 110 fthat faces toward the abrasive 20 f. However, other designs of theabrasion tool device 12 f are also conceivable, in particular in respectof an arrangement of the heat transfer coating 42 f or without a heattransfer coating 42 f. The intermediate element 110 f is made from ametal, and is at least substantially plate-like. It is also conceivable,however, for the intermediate element 110 f to be made from a plastic,in particular polyurethane. Particularly preferably, the intermediateelement 110 f is made from materials/a material other than a foam. Alsoconceivable, however, are designs of the intermediate element 110 f inwhich the intermediate element 110 f is made entirely, or at leastpartially, from a foam. The intermediate element 110 f has a maximumthickness 134 f that is preferably less than 3 mm, preferably less than2 mm, and more preferably less than 1.5 mm. In particular, the maximumthickness 134 f of the intermediate element 110 f is at least 0.5 mm,preferably at least 0.8 mm, and more preferably at least mm. It isconceivable for the intermediate element 110 f to comprise cut-outs orprotuberances for optimized heat distribution away from the abrasive 20f (not shown in FIG. 9), which are arranged in particular at leastpartially on an underside of the intermediate element 110 f that facestoward the abrasive 20 f.

The intermediate element 110 f has a seating face 136 f designed forarrangement of the intermediate element 110 f on the backing element 22f. In particular, the seating face 136 f is arranged on a side of theintermediate element 110 f that faces toward the backing element 22 f,in particular when the abrasion tool device 12 f is in an assembledstate. Preferably, the seating face 136 f, in particular as viewed alongthe central axis 96 f of the backing element 22 f, is at leastsubstantially identical in shape to the contact face 34 f of the backingelement 22 f. The intermediate element 110 f comprises a contact face138 f designed for arrangement of the abrasive 20 f on the intermediateelement 110 f. Preferably, the seating face 136 f of the intermediateelement 110 f, in particular as viewed along a central axis of theintermediate element 110 f that, in particular when the intermediateelement 110 f is arranged on the backing element 22 f, comprises thecentral axis 96 f of the backing element 22 f, is at least substantiallyidentical in shape to the abrasive 20 f, in particular to a base surfaceof the abrasive 20 f in a plane of main extent of the abrasive 20 f Itis conceivable for the contact face 138 f and the seating face 136 f ofthe intermediate element 110 f to be at least substantially identical,or to differ, in design.

Preferably, it is conceivable for the contact face 138 f and the seatingface 136 f of the intermediate element 110 f to differ from each otherin their basic geometric shape.

The abrasion tool device 12 f, in particular the intermediate element110 f and the backing element 22 f, is/are of a modular design, it beingconceivable in particular for the abrasion tool device 12 f and/or theabrasion tool system 10 f to be operated with and without anintermediate element 110 f. The intermediate element 110 f is designedto adapt a contact face 34 f of the backing element 22 f to a shape ofthe abrasive 20 f that may differ from a shape of the contact face 34 f,in order to support the abrasive 20 f. Preferably, the intermediateelement 110 f can be used to process a workpiece with differently shapedabrasives 20 f, in particular without removing the backing element 22 f.For example, without changing and/or removing the backing element 22 f,a round abrasive 20 f can be used for working a flat face of a workpieceby means of a round intermediate element 110 f and/or, for working in acorner, an intermediate element 110 f realized with at least one cornercan be used with an angular abrasive 20 f supported by the intermediateelement 110 f. The intermediate element 110 f is designed to adapt acounterforce of the abrasion tool device 12 f that counteracts a forcetransmitted from the workpiece, via the abrasive 20 f, to the abrasiontool device 12 f as work is being performed on a workpiece, inparticular for the purpose of protecting the workpiece, the abrasive 20f and/or the abrasion tool device 12 f, and/or for the purpose ofprotecting a user. For example, in the case of working on a softersurface such as, for example, wood, a lower counterforce is advantageousthan, for example, in the case of working on metal, with theintermediate element 110 f, which in particular has a lesser stiffnessthan the backing element 22 f, being arranged between the backingelement 22 f and the abrasive 20 f in the case of working on wood. Inparticular, it is conceivable for the abrasion tool device 12 f, in thecase of working on metal, to be used without the intermediate element110 f or with a further intermediate element, in particular made of astiffer material than the intermediate element 110 f.

1. An abrasion plate, comprising: at least one backing unit includingone of a support pad and a support plate, at least one fastening unitconfigured to detachably fasten at least one abrasive selected from thegroup consisting of an abrasive paper, and an abrasive fleece, to the atleast one backing unit, and at least one backing element on which theabrasive is arranged via the fastening unit when the at least oneabrasive is detachably fastened to the at least one fastening unit,wherein the at least one backing element is made from a material havinga melting temperature of more than 160° C.
 2. The abrasion plate asclaimed in claim 1, wherein the at least one fastening unit comprises atleast one fastening element configured to fasten the at least oneabrasive to the at least one backing element, that is made from amaterial having a melting temperature of more than 160° C.
 3. Theabrasion plate as claimed in claim 1, wherein the at least one fasteningunit comprises at least one adhesive element that is designed toreplaceably fasten the at least one fastening element of the at leastone fastening unit that is realized as a hook-and-loop fastening, to theat least one backing element.
 4. The abrasion plate as claimed in claim1, wherein the at least one backing element has a maximum thickness of 5mm measured perpendicularly to a contact face of the at least onebacking unit with the at least one fastening unit.
 5. The abrasion plateas claimed in claim 1, further comprising: at least one heat transfercoating arranged at least one of between the at least one backingelement, and the fastening unit, and on a side of the at least onefastening unit that faces away from the at least one backing element. 6.The abrasion plate as claimed in claim 1, wherein: the at least onefastening unit comprises at least one fastening element; and the atleast one fastening element bears at least substantially with fullsurface contact against the at least one backing element.
 7. Theabrasion plate as claimed in claim 7, further comprising: at least oneprotective unit, which is arranged on the at least one backing elementand is designed, during an abrasion operation, to protect a workpiece,the at least one backing element or an external unit, from damage,and/or to damp a direct impact, of the at least one backing element onthe workpiece or on the external unit.
 8. The abrasion plate as claimedin claim 7, wherein a protective element of the at least one protectiveunit has a melting temperature of more than 220° C.
 9. The abrasionplate as claimed in claim 7, wherein: the at least one protective unitcomprises at least one protective element; the at least one protectiveelement, as viewed along a central axis of the at least one backingelement has an outer edge that has a greater minimum distance than hasan outer edge of the at least one backing element from the central axisof the at least one backing element.
 10. The abrasion plate as claimedin claim 7, wherein the at least one protective unit comprises at leastone protective element that has at least one outer face which, at leastsubstantially perpendicularly to a central axis of the at least onebacking element, has a greater maximum distance than has an outer edgeof the at least one backing element from the central axis, and which, asviewed in a sectional plane comprising the central axis of the at leastone backing element, is at least substantially inclined relative to thecentral axis (96 a, 96 e) of the at least one backing element.
 11. Theabrasion plate as claimed in claim 7, wherein the at least oneprotective unit comprises at least one protective element that extends,at least substantially perpendicularly to a central axis of the at leastone backing element, at least substantially entirely, over a maximumextent of the at least one backing element.
 12. The abrasion plate asclaimed in claim 7, wherein the at least one backing element realizes atleast one holding means that is designed to hold a protective element ofthe at least one protective unit on the at least one backing element ina force-fitting and/or form-fitting manner.
 13. The abrasion plate asclaimed in claim 1, wherein the at least one fastening unit comprises atleast one intermediate element that is designed to be arranged betweenthe backing element and the abrasive so as to be at least substantiallynon-destructively removable and/or replaceable at least substantiallywithout use of any tools, wherein the at least one intermediate elementis made from a material having a melting temperature of more than 180°C.
 14. The abrasion plate as claimed in claim 1, wherein the at leastone backing element is realized as a strut structure.
 15. The abrasionplate as claimed in claim 14, wherein: the at least one backing unitcomprises at least one support element; the at least one support elementat least mainly encloses the at least one backing element; and the atleast one support element has a thermal conduction characteristic thatis greater than a thermal conduction characteristic of the at least onebacking element.
 16. An abrasive, comprising: at least one working facethat has a multiplicity of abrasive elements; at least one interface orconnection face configured to be arranged on or connected to the atleast one fastening unit of the abrasion plate of claim 1, wherein theat least one interface or connection face has at least one fasteningelement realized as a hook-and-loop fastening, which is made from amaterial having a melting temperature of more than 160° C.
 17. Theabrasive as claimed in claim 16, further comprising at least one heattransfer coating arranged between the at least one working face and theat least one fastening element.
 18. An abrasion tool system, comprisingat least one abrasion plate as claimed in claim 1.